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John O'Brien Clarke, MD

Gastroenterology · Emeryville

NPI 1467539643

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
17
3 carriers
Offices
5

Offices

5 locations · Stanford Health Care · 3,152 clinicians in this group

Looking this up.

Hospitals listed: Stanford Health Care. That is not proof they admit you there this week.

Plans that list them

17 plans · 3 carriers

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Clarke’s office to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

17 of 17 plans

Plans whose provider directory lists this clinician
Alignment Health BreathEasy (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Clarity (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Harmony (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes CalPlus (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes Care (HMO C-SNP)Alignment Health PlanListedSep 28, 2026
Alignment Health Heart & Diabetes Choice (HMO C-SNP)Alignment Health PlanListedSep 28, 2026
Alignment Health Honor+ Plan (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health My Choice CalCare (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health Silicon (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health smartHMO (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health the ONE (HMO)Alignment Health PlanListedOct 3, 2026
SCAN Balance (HMO C-SNP)SCAN Health PlanListedOct 3, 2026
SCAN Classic (HMO)SCAN Health PlanListedOct 3, 2026
SCAN MyChoice (HMO)SCAN Health PlanListedOct 3, 2026
SCAN Strive (HMO C-SNP)SCAN Health PlanListedOct 3, 2026
DualConnect (HMO D-SNP)Santa Clara Family Health PlanListedSep 1, 2026

California Medical Board record

Licence C143081 · Current

Licensed to practise in California · since 2016 · expires 2028-06-30 · Columbia University College of Physicians and Surgeons.

No disciplinary actions, convictions, malpractice judgments or citations in this record.

Hospitals they work in

1 hospital

These rate the hospital, not this clinician. Most measures at most hospitals are no different from the national rate.

  • Stanford Health CareStanford, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Stanford Health Care, which runs 3 hospitalsHome of Stanford Cancer Institute, a National Cancer Institute designated comprehensive cancer centrePatients rate it 4 of 5 · 83% would definitely recommend it
    Overall rating: 5 of 5 starsWorse than the national rate — Perioperative pulmonary embolism or deep vein thrombosis rate: 5.31 (4.24 to 6.37) · 8,661 cases, Jul 2022 – Jun 2024Worse than the national rate — Rate of inpatient admissions for patients receiving outpatient chemotherapy: 14.1 (12.7 to 15.7) · 2,191 cases, Jan 2024 – Dec 2024Better than the national rate — Postoperative respiratory failure rate: 4.08 (1.95 to 6.21) · 5,296 cases, Jul 2022 – Jun 2024Better than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.317, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.446, Oct 2024 – Sep 2025Better than the national rate — SSI - Colon Surgery: 0.241, Oct 2024 – Sep 2025Better than the national rate — Ratio of unplanned hospital visits after hospital outpatient surgery: 0.7 (0.6 to 0.9) · 3,348 cases, Jan 2024 – Dec 2024
See every measure and the patient survey for Stanford Health Care

Behind the star rating — Deaths: 5 better, 3 the same, 0 worse of 8 measures. Safety: 3 better, 5 the same, 0 worse of 8 measures. Readmissions: 2 better, 5 the same, 4 worse of 11 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.

Every scored measure at Stanford Health Care
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths5.31 (4.24 to 6.37) · 8,661 casesWorseJul 2022 – Jun 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits14.1 (12.7 to 15.7) · 2,191 casesWorseJan 2024 – Dec 2024
Postoperative respiratory failure rateComplications and deaths4.08 (1.95 to 6.21) · 5,296 casesBetterJul 2022 – Jun 2024
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.317BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.446BetterOct 2024 – Sep 2025
SSI - Colon SurgeryInfections0.241BetterOct 2024 – Sep 2025
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits0.7 (0.6 to 0.9) · 3,348 casesBetterJan 2024 – Dec 2024
Abdominopelvic accidental puncture or laceration rateComplications and deaths1.06 (0.45 to 1.67) · 5,374 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths0.86 (0.72 to 1)No differentJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths166.09 (137.88 to 194.3) · 470 casesNo differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths1.1 · 192 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths6.4 · 146 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths9.7 · 253 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths6.3 · 880 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths10.3 · 935 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths8.7 · 501 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths2.1 · 7,730 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.13 (0 to 0.27) · 20,799 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.28 (0.14 to 0.43) · 23,182 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths0.94 (0.2 to 1.68) · 5,694 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2.36 (1.54 to 3.19) · 7,846 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths5.2 (3.76 to 6.64) · 5,603 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.38 (0.23 to 2.53) · 2,211 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.52 (0.21 to 0.83) · 19,915 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths3.6 · 416 casesNoneApr 2023 – Mar 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.869No differentOct 2024 – Sep 2025
MRSA BacteremiaInfections0.857No differentOct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections0.368No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits16.2 · 247 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits20.5 · 1,021 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits47.8 · 258 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits-1.6 · 990 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits20.8 · 976 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits16.5 · 959 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits5.2 (4.4 to 6.2) · 2,191 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits5.1 · 425 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits9.6 · 158 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits19.6 · 183 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits12.7 (10.4 to 15.4) · 4,578 casesNo differentJan 2022 – Dec 2024

What patients said (6,810 patients answered, 25% of those asked)

Patient survey stars by topic at Stanford Health Care
Cleanliness4
Nurse communication4
Doctor communication4
Communication about medicines3
Discharge information4
Overall hospital rating4
Quietness2
Recommend hospital5
Share of patients giving the best answer at Stanford Health Care
Room was "always" clean75%
Nurses "always" communicated well82%
Doctors "always" communicated well81%
Staff "always" explained63%
Yes, staff "did" give patients this information89%
Yes, staff "did" give patients information about help after discharge89%
Doctors "always" explained things so they could understand76%
Doctors "always" listened carefully80%
Doctors "always" treated them with courtesy and respect87%
Patients who gave a rating of "9" or "10" (high)79%
Staff "always" explained new medications76%
Nurses "always" explained things so they could understand77%
Nurses "always" listened carefully79%
Nurses "always" treated them with courtesy and respect88%
"Always" quiet at night53%
"YES", patients would definitely recommend the hospital83%
Staff "always" explained possible side effects50%
Yes, staff "did" give patients information about possible symptoms90%

Original Medicare doctor bills

$122,769

Medicare paid this office $122,769 for 593 people.

This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.

Largest Original Medicare bills
Return visit (30+ min)228$29,549$101
New patient visit (45+ min)60$8,242$137
Long return visit (40+ min)38$7,170$149
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope85$5,590$63
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope90$4,929$52
See all 30 services
Every Original Medicare service billed
Return visit (30+ min)228$29,549$101
New patient visit (45+ min)60$8,242$137
Long return visit (40+ min)38$7,170$149
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope85$5,590$63
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope90$4,929$52
Study of esophagus to assess movement85$4,902$57
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm31$4,559$117
Removal of polyps or growths of large bowel using an endoscope with mechanical snare17$4,036$237
Monitoring and recording of esophageal function through nasal tube with electrode84$3,621$43
Biopsy of large bowel using a flexible endoscope27$3,298$122
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes26$3,024$116
Monitoring and recording of esophageal function through a capsule attached to the esophagus wall33$2,368$72
Insertion of tube or tube in esophagus, stomach, and/or upper small bowel using a flexible endoscope24$2,282$95
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope22$2,217$101
Biopsy of large bowel using a flexible endoscope16$1,939$121
Insertion of tube or tube in esophagus, stomach, and/or upper small bowel using a flexible endoscope19$1,931$102
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes22$1,902$70
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes25$1,771$71
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm15$1,530$90
Injection of esophagus, stomach, and/or upper small bowel using a flexible endoscope18$1,512$72
Diagnostic exam of large bowel using a flexible endoscope12$1,466$122
Study of esophageal sensation by balloon distension32$1,409$44
Short return visit (20+ min)15$1,229$77
Prolonged monitoring and recording of esophageal function through nasal tube with electrode19$944$50
Measurement of hydrogen in breath to test for stomach and bowel symptoms49$868$9
Study of rectum sensitivity and function12$853$71
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's53$772$15
Study of esophageal sensation by balloon distension15$665$39
Test for tone and sensation of rectum and anus12$470$39
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito34$159$5

Procedures Medicare counted

Procedure volume Medicare published
Colonoscopy45More than 61% of doctors who do this
Upper gastrointestinal (GI) endoscopy for acid reflux299More than 95% of doctors who do this

Who their Medicare patients are

593 Original Medicare patients in 2024. Average age 71 · Under 65 16% · 85 and older 8% · Women 61% · Also on Medicaid 23% · Health risk score 1.80. Above the middle of the specialty; the typical gastroenterology clinician is at 1.42.

Conditions among them: High blood pressure 65% · Depression 30% · Coronary heart disease 29% · Chronic kidney disease 26% · Diabetes 25% · Heart failure 22% · Cancer 19% · Atrial fibrillation 18% · COPD 17% · Stroke 10% · Dementia 7%.

The office billed $1,676,783, Medicare allowed $160,302 and paid $122,769; for 1,476 services of 53 kinds.

Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.

Year by year

Original Medicare by year
20245931,476711.80$1,676,783$122,769
20235151,255711.48$1,379,618$100,523
20225001,180711.63$1,173,832$95,422
20214671,232701.90$1,309,450$102,847
20203871,031691.96$1,058,296$80,292
20194481,129691.95$1,017,819$86,774
20183861,058701.93$995,716$78,929
2017297730691.93$602,480$52,792
2016358700671.77$361,491$53,825
2015437913662.06$373,393$73,716
2014381709652.17$321,163$61,917
2013340652662.07$291,829$59,707

Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.

See the services billed each year

2023: 24 services

Original Medicare services billed in 2023
Return visit (30+ min)185$19,700$77
New patient visit (45+ min)78$8,778$113
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope84$7,517$88
Long return visit (40+ min)44$7,016$125
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope87$4,881$55
Removal of polyps or growths of large bowel using an endoscope with mechanical snare18$4,251$236
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm26$4,179$127
Biopsy of large bowel using a flexible endoscope34$4,025$118
Study of esophagus to assess movement68$3,976$57
Removal of polyps or growths of large bowel using an endoscope with mechanical snare14$3,348$239
Monitoring and recording of esophageal function through nasal tube with electrode68$2,951$43
Monitoring and recording of esophageal function through a capsule attached to the esophagus wall36$2,357$65
Insertion of tube or tube in esophagus, stomach, and/or upper small bowel using a flexible endoscope18$2,214$123
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm17$2,213$123
Biopsy of large bowel using a flexible endoscope17$1,967$116
Prolonged monitoring and recording of esophageal function through nasal tube with electrode28$1,422$51
Study of esophageal sensation by balloon distension26$1,162$45
Study of esophageal sensation by balloon distension25$1,137$45
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes13$983$76
Short return visit (20+ min)11$600$55
Measurement of hydrogen in breath to test for stomach and bowel symptoms47$486$8
Injection of esophagus, stomach, and/or upper small bowel using a flexible endoscope11$381$35
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito51$238$5
Injection of esophagus, stomach, and/or upper small bowel using a flexible endoscope14$235$17

2022: 21 services

Original Medicare services billed in 2022
Return visit (30+ min)167$18,346$79
Long return visit (40+ min)55$8,418$115
New patient visit (45+ min)69$6,881$100
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope67$5,695$85
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm35$5,478$124
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope74$4,126$54
Removal of polyps or growths of large bowel using an endoscope with mechanical snare14$3,217$230
Study of esophagus to assess movement56$3,019$54
Biopsy of large bowel using a flexible endoscope23$2,644$115
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes23$2,390$65
New patient visit (60+ min)14$2,312$165
Monitoring and recording of esophageal function through a capsule attached to the esophagus wall31$2,294$74
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes25$2,244$90
Monitoring and recording of esophageal function through nasal tube with electrode55$2,192$40
Biopsy of large bowel using a flexible endoscope15$2,092$139
Prolonged monitoring and recording of esophageal function through nasal tube with electrode27$1,334$49
Short return visit (20+ min)24$1,289$50
Study of esophageal sensation by balloon distension21$896$43
Study of esophageal sensation by balloon distension19$872$46
Measurement of hydrogen in breath to test for stomach and bowel symptoms44$403$9
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito44$184$4

2021: 25 services

Original Medicare services billed in 2021
Return visit (30+ min)153$18,008$83
Long return visit (40+ min)57$10,068$124
New patient visit (45+ min)60$7,291$122
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope89$6,397$70
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope64$5,009$71
Removal of polyps or growths of large bowel using an endoscope with mechanical snare17$3,945$232
Study of esophagus to assess movement70$3,808$54
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm19$3,723$116
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes34$3,133$92
Monitoring and recording of esophageal function through nasal tube with electrode64$2,780$43
New patient visit (60+ min)17$2,552$150
Monitoring and recording of esophageal function through a capsule attached to the esophagus wall33$2,360$72
Insertion of tube or tube in esophagus, stomach, and/or upper small bowel using a flexible endoscope20$2,277$114
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm13$2,182$128
Biopsy of large bowel using a flexible endoscope19$2,038$107
Biopsy of large bowel using a flexible endoscope15$1,781$119
Study of esophageal sensation by balloon distension31$1,444$47
Prolonged monitoring and recording of esophageal function through nasal tube with electrode28$1,402$50
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes14$1,394$66
Telephone medical discussion with physician, 21-30 minutes16$1,183$66
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope11$1,098$100
Short return visit (20+ min)11$637$58
Study of esophageal sensation by balloon distension14$589$42
Measurement of hydrogen in breath to test for stomach and bowel symptoms39$374$9
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito53$268$4

2020: 22 services

Original Medicare services billed in 2020
Return visit (30+ min)137$13,386$70
Long return visit (40+ min)50$6,491$98
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm28$5,109$131
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope57$4,610$77
New patient visit (45+ min)39$4,067$104
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope74$3,445$47
Study of esophagus to assess movement52$2,849$55
Removal of polyps or growths of large bowel using an endoscope with mechanical snare11$2,663$242
Insertion of tube or tube in esophagus, stomach, and/or upper small bowel using a flexible endoscope19$2,460$129
Biopsy of large bowel using a flexible endoscope18$2,222$123
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm15$2,141$134
Monitoring and recording of esophageal function through nasal tube with electrode45$1,889$42
Telephone medical discussion with physician, 21-30 minutes21$1,722$72
Injection of esophagus, stomach, and/or upper small bowel using a flexible endoscope13$1,618$116
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes18$1,616$62
Biopsy of large bowel using a flexible endoscope16$1,598$100
Study of esophageal sensation by balloon distension28$1,350$48
Prolonged monitoring and recording of esophageal function through nasal tube with electrode24$1,231$51
Monitoring and recording of esophageal function through a capsule attached to the esophagus wall14$1,081$77
Study of esophageal sensation by balloon distension14$613$44
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito43$228$5
Measurement of hydrogen in breath to test for stomach and bowel symptoms20$180$9

2019: 24 services

Original Medicare services billed in 2019
Long return visit (40+ min)90$10,990$98
Return visit (30+ min)105$8,847$66
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope79$6,797$84
New patient visit (45+ min)38$4,141$109
Study of esophagus to assess movement57$3,495$61
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope55$3,453$61
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm20$3,182$122
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes23$2,090$91
Monitoring and recording of esophageal function through nasal tube with electrode42$1,956$47
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm14$1,924$128
Insertion of tube or tube in esophagus, stomach, and/or upper small bowel using a flexible endoscope18$1,914$106
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes19$1,876$65
Biopsy of large bowel using a flexible endoscope16$1,773$111
Monitoring and recording of esophageal function through a capsule attached to the esophagus wall22$1,656$75
Prolonged monitoring and recording of esophageal function through nasal tube with electrode32$1,650$52
New patient visit (60+ min)11$1,592$145
Biopsy of large bowel using a flexible endoscope14$1,589$114
Short return visit (20+ min)31$1,540$47
Study of esophageal sensation by balloon distension28$1,296$46
Study of esophageal sensation by balloon distension23$1,054$46
New patient visit (30+ min)13$814$63
New patient visit (30+ min)14$814$58
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito69$387$5
Measurement of hydrogen in breath to test for stomach and bowel symptoms35$345$9

2018: 28 services

Original Medicare services billed in 2018
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope110$7,919$71
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm26$5,535$120
Return visit (30+ min)64$4,705$69
Return visit (30+ min)50$3,956$65
New patient visit (45+ min)33$3,499$106
Biopsy of large bowel using a flexible endoscope26$3,385$125
Long return visit (40+ min)27$3,381$97
New patient visit (45+ min)29$3,309$114
Removal of polyps or growths of large bowel using an endoscope with mechanical snare13$2,875$221
Long return visit (40+ min)26$2,793$96
Study of esophagus to assess movement39$2,244$58
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm13$2,037$136
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope29$1,886$61
Study of esophagus to assess movement30$1,796$60
Injection of esophagus, stomach, and/or upper small bowel using a flexible endoscope20$1,743$79
Study of esophageal sensation by balloon distension39$1,729$44
Biopsy of large bowel using a flexible endoscope11$1,698$142
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes17$1,527$90
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes16$1,307$65
Insertion of tube or tube in esophagus, stomach, and/or upper small bowel using a flexible endoscope11$1,223$111
New patient visit (30+ min)18$1,212$67
Monitoring and recording of esophageal function through nasal tube15$730$46
Monitoring and recording of esophageal function through nasal tube15$691$46
Monitoring and recording of esophageal function through nasal tube with electrode11$503$46
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito57$291$5
Measurement of hydrogen in breath to test for stomach and bowel symptoms21$230$9
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito40$200$5
Measurement of hydrogen in breath to test for stomach and bowel symptoms17$148$8

2017: 16 services

Original Medicare services billed in 2017
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope79$6,708$81
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm34$5,142$120
Long return visit (40+ min)39$4,738$93
Return visit (30+ min)57$4,391$62
New patient visit (45+ min)40$4,195$105
Removal of polyps or growths of large bowel using an endoscope with mechanical snare14$3,276$234
Study of esophagus to assess movement48$2,864$58
Biopsy of large bowel using a flexible endoscope22$2,786$127
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes23$2,153$90
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes17$1,696$63
New patient visit (30+ min)25$1,629$65
Monitoring and recording of esophageal function through nasal tube20$920$46
Study of esophageal sensation by balloon distension18$860$45
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito71$374$5
Measurement of hydrogen in breath to test for stomach and bowel symptoms26$260$9
Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes14$153$11

2016: 17 services

Original Medicare services billed in 2016
Return visit (30+ min)142$11,047$60
New patient visit (45+ min)37$4,084$110
Long return visit (40+ min)34$3,658$89
Biopsy of large bowel using a flexible endoscope29$3,506$121
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope43$2,947$67
Removal of polyps or growths of large bowel using an endoscope with mechanical snare13$2,946$227
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm19$2,681$128
Study of esophagus to assess movement47$2,551$54
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes19$2,212$58
Diagnostic exam of large bowel using a flexible endoscope12$1,996$166
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes23$1,939$84
Study of rectum sensitivity and function25$1,904$76
New patient visit (30+ min)19$1,274$67
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope13$1,223$94
Test for tone and sensation of rectum and anus26$1,103$42
Monitoring and recording of esophageal function through nasal tube18$749$42
Monitoring and recording of esophageal function through nasal tube with electrode13$513$39

2015: 18 services

Original Medicare services billed in 2015
Return visit (30+ min)136$12,080$62
Biopsy of large bowel using a flexible endoscope41$7,402$181
Long return visit (40+ min)48$6,363$87
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm37$5,174$129
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope72$4,161$56
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes46$3,911$85
Removal of polyps or growths of large bowel using an endoscope with mechanical snare16$3,884$243
New patient visit (45+ min)35$3,691$105
Study of esophagus to assess movement52$2,983$57
Diagnostic exam of large bowel using a flexible endoscope16$2,742$171
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes26$2,655$60
Study of rectum sensitivity and function32$2,209$69
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes17$1,948$115
Test for tone and sensation of rectum and anus29$1,295$43
Monitoring and recording of esophageal function through nasal tube with electrode22$949$43
Short return visit (20+ min)23$940$39
New patient visit (30+ min)13$771$59
Monitoring and recording of esophageal function through nasal tube14$591$42

2014: 19 services

Original Medicare services billed in 2014
Return visit (30+ min)104$8,841$62
Biopsy of large bowel using a flexible endoscope26$4,794$178
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope74$4,669$63
Long return visit (40+ min)27$3,217$92
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm25$3,066$123
Diagnostic exam of large bowel using a flexible endoscope17$2,868$169
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk12$2,772$231
Removal of polyps or growths of large bowel using an endoscope with mechanical snare11$2,511$228
Return visit (30+ min)25$2,317$75
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes30$2,048$57
Study of esophagus to assess movement36$2,023$55
New patient visit (45+ min)16$1,745$109
Long return visit (40+ min)12$1,684$120
Study of rectum sensitivity and function23$1,657$72
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope12$1,193$99
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes11$1,117$86
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes13$1,097$84
Monitoring and recording of esophageal function through nasal tube with electrode13$570$44
Test for tone and sensation of rectum and anus11$472$43

2013: 13 services

Original Medicare services billed in 2013
Biopsy of large bowel using a flexible endoscope38$6,190$163
Return visit (30+ min)73$6,154$60
Return visit (30+ min)57$5,751$82
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope52$4,287$79
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm22$4,031$139
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes30$2,916$58
Diagnostic exam of large bowel using a flexible endoscope18$2,866$151
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes22$1,910$83
Study of esophagus to assess movement31$1,812$57
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope12$1,343$112
Short return visit (20+ min)23$1,007$37
Short return visit (20+ min)18$836$46
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes13$411$32

Medicaid work

$5,904 in 2024

Medicaid paid $5,904 for 54 billed services this clinician did in 2024, up to 15 people in a month for one service.

Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.

Largest Medicaid services in 2024
Upper gastrointestinal endoscopy with biopsy38$4,749
Return visit (30+ min)16$1,155
Medicaid work by year
202454215$5,904
202351315$8,070
202216116$2,180
202127114$7,789
202037313$1,552
201961317$5,647
201855317$3,824
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
Upper gastrointestinal endoscopy with biopsy27$7,105
Return visit (30+ min)12$593
TISSUE EXAM BY PATHOLOGIST12$373

2022

Largest Medicaid services in 2022
Upper gastrointestinal endoscopy with biopsy16$2,180

2021

Largest Medicaid services in 2021
Upper gastrointestinal endoscopy with biopsy27$7,789

2020

Largest Medicaid services in 2020
Return visit (30+ min)13$742
TISSUE EXAM BY PATHOLOGIST12$527
Upper gastrointestinal endoscopy with biopsy12$283

2019

Largest Medicaid services in 2019
Upper gastrointestinal endoscopy with biopsy31$4,195
TISSUE EXAM BY PATHOLOGIST18$1,070
Return visit (30+ min)12$382

2018

Largest Medicaid services in 2018
Upper gastrointestinal endoscopy with biopsy25$2,933
TISSUE EXAM BY PATHOLOGIST17$836
Injection, midazolam hydrochloride, per 1 mg13$55

Drugs they prescribed that Part D paid

$282,842

Pharmacies billed $282,842 in 2024.

This is pharmacy cost, not the office bill, and not what patients paid.

Opioids were 0% of their Part D prescriptions (0 of 901) in 2024. At or below the middle of the specialty; the typical gastroenterology clinician is at 0%.

672 generic and fewer than 11 brand-name prescriptions · $282,842 in drug cost · 62 antibiotic prescriptions to 30 people.

Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.

Largest Part D drug costs
Xifaxan26$73,487$2,826
Motegrity54$50,815$941
Linzess41$39,429$962
Dexlansoprazole Dr76$29,566$389
Trulance16$13,590$849
See all 17 drugs
Every Part D drug this clinician prescribed
Xifaxan26$73,487$2,826
Motegrity54$50,815$941
Linzess41$39,429$962
Dexlansoprazole Dr76$29,566$389
Trulance16$13,590$849
Esomeprazole Magnesium53$7,011$132
Pantoprazole87$4,019$46
Sucralfate11$1,563$142
Peg 3350-Electrolyte41$894$22
Famotidine53$829$16
Omeprazole65$773$12
Mirtazapine17$732$43
Ondansetron Odt13$720$55
Pyridostigmine16$614$38
Baclofen15$313$21
Gavilyte-G16$251$16
Gabapentin12$126$10

Year by year

Part D prescribing by year
20249012440% (0)None$282,842
20237762240% (0)None$252,674
2022756211None33%$233,356
20217302010% (0)None$201,611
20207061690% (0)None$169,187
20196621780% (0)None$173,886
20184401560% (0)None$91,317
2017291130None24%$62,259
2016677160NoneNone$292,133
2015667140NoneNone$275,460
2014544113NoneNone$189,838
201344480NoneNone$115,437

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

See the drugs prescribed each year

2023: 16 drugs

Part D drugs prescribed in 2023
Xifaxan29$81,009$2,793
Motegrity37$41,101$1,111
Dexlansoprazole Dr87$40,064$461
Linzess38$36,467$960
Trulance13$10,139$780
Esomeprazole Magnesium51$5,542$109
Famotidine48$1,890$39
Pantoprazole55$1,521$28
Peg 3350-Electrolyte56$1,284$23
Omeprazole54$1,248$23
Mirtazapine18$739$41
Ondansetron Odt13$398$31
Gavilyte-G19$324$17
Baclofen17$217$13
Bethanechol Chloride11$139$13
Ondansetron14$110$8

2022: 17 drugs

Part D drugs prescribed in 2022
Xifaxan29$75,788$2,613
Motegrity31$33,658$1,086
Linzess43$31,616$735
Dexilant29$16,828$580
Dexlansoprazole Dr35$16,291$465
Trulance12$7,311$609
Lubiprostone15$7,267$484
Esomeprazole Magnesium57$6,396$112
Ondansetron Odt16$1,718$107
Pantoprazole66$1,598$24
Omeprazole66$1,578$24
Colestipol15$1,281$85
Peg 3350-Electrolyte45$858$19
Famotidine31$700$23
Baclofen20$421$21
Dicyclomine12$256$21
Buspirone12$178$15

2021: 17 drugs

Part D drugs prescribed in 2021
Xifaxan30$58,587$1,953
Dexilant63$47,016$746
Linzess25$18,430$737
Motegrity15$12,048$803
Lansoprazole12$8,487$707
Esomeprazole Magnesium59$7,992$135
Clinisol21$6,073$289
Ondansetron Odt17$2,403$141
Pantoprazole86$1,966$23
Suprep14$1,654$118
Famotidine45$1,052$23
Omeprazole61$1,019$17
Mirtazapine12$533$44
Peg 3350-Electrolyte37$469$13
Famotidine18$270$15
Amlodipine Besylate13$188$14
Promethazine13$176$14

2020: 19 drugs

Part D drugs prescribed in 2020
Xifaxan33$53,066$1,608
Dexilant32$25,579$799
Motegrity14$14,908$1,065
Linzess24$14,294$596
Esomeprazole Magnesium47$8,228$175
Sucralfate11$3,786$344
Pantoprazole63$1,268$20
Suprep12$1,267$106
Omeprazole66$932$14
Pyridostigmine11$684$62
Ondansetron Odt14$627$45
Famotidine44$605$14
Promethazine21$404$19
Gavilyte-G21$318$15
Metronidazole14$298$21
Metoclopramide20$275$14
Amitriptyline11$240$22
Amlodipine Besylate20$191$10
Losartan11$66$6

2019: 16 drugs

Part D drugs prescribed in 2019
Xifaxan27$44,092$1,633
Dexilant33$23,487$712
Linzess29$21,815$752
Motegrity21$14,029$668
Clinisol35$7,273$208
Esomeprazole Magnesium41$6,955$170
Pantoprazole87$1,576$18
Omeprazole51$1,159$23
Pyridostigmine11$1,131$103
Suprep11$1,077$98
Ondansetron Odt15$245$16
Gavilyte-N11$228$21
Famotidine27$190$7
Peg 3350-Electrolyte11$184$17
Metronidazole14$168$12
Amlodipine Besylate14$137$10

2018: 12 drugs

Part D drugs prescribed in 2018
Dexilant26$14,157$545
Aprepitant12$12,753$1,063
Linzess16$12,410$776
Clinisol50$12,034$241
Pyridostigmine11$820$75
Omeprazole41$534$13
Pantoprazole42$483$11
Polyethylene Glycol 335021$456$22
Gavilyte-N21$312$15
Peg 3350-Electrolyte12$205$17
Metoclopramide18$201$11
Dicyclomine11$70$6

2017: 10 drugs

Part D drugs prescribed in 2017
Xifaxan15$23,452$1,563
Clinisol34$9,120$268
Linzess11$8,774$798
Dexilant11$3,839$349
Esomeprazole Magnesium12$3,524$294
Ranitidine17$424$25
Pantoprazole14$230$16
Omeprazole20$167$8
Diltiazem11$109$10
Dicyclomine12$94$8

2016: 16 drugs

Part D drugs prescribed in 2016
Xifaxan47$74,415$1,583
Sancuso20$44,256$2,213
Nexium31$33,872$1,093
Linzess51$32,230$632
Esomeprazole Magnesium34$14,763$434
Dexilant27$14,679$544
Pyridostigmine43$3,697$86
Octreotide Acetate14$2,260$161
Bethanechol Chloride28$1,618$58
Pantoprazole55$1,389$25
Rabeprazole13$753$58
Lansoprazole12$584$49
Promethazine12$377$31
Ranitidine28$376$13
Omeprazole26$343$13
Buspirone17$274$16

2015: 14 drugs

Part D drugs prescribed in 2015
Xifaxan27$53,560$1,984
Sancuso25$50,623$2,025
Nexium47$39,826$847
Linzess62$28,102$453
Octreotide Acetate14$10,237$731
Dexilant16$8,701$544
Esomeprazole Magnesium22$8,450$384
Pyridostigmine25$2,818$113
Lansoprazole22$1,640$75
Bethanechol Chloride28$1,577$56
Pantoprazole51$1,521$30
Omeprazole28$496$18
Metronidazole14$317$23
Ranitidine25$306$12

2014: 12 drugs

Part D drugs prescribed in 2014
Nexium65$42,709$657
Xifaxan23$30,570$1,329
Linzess54$22,382$414
Lansoprazole19$2,373$125
Bethanechol Chloride24$1,756$73
Pantoprazole44$1,049$24
Omeprazole29$927$32
Promethazine26$857$33
Pyridostigmine15$731$49
Ondansetron18$727$40
Metronidazole22$431$20
Ranitidine20$254$13

2013: 12 drugs

Part D drugs prescribed in 2013
Xifaxan22$27,410$1,246
Nexium50$22,079$442
Linzess34$10,195$300
Dexilant11$2,527$230
Ondansetron43$2,324$54
Lansoprazole12$1,635$136
Pantoprazole37$1,070$29
Promethazine24$724$30
Omeprazole17$485$29
Famotidine32$444$14
Ranitidine11$132$12
Mirtazapine13$124$10

Money from drug and device companies

$130 in 2025

Industry payments by year
202522None$130
202422$1,900$1,919
2023231None$188
202223$1,493$1,683
202136$6,784$6,987
202046$18,226$18,249
201912None$934

Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.

A payment is not proof that care is biased.

Payments by company
Phathom PharmaceuticalsVoquezna$100
1 payment
  • Meals for Voquezna · 2025-05-05 · $100
Mauna Kea TechnologiesNone$29
1 payment
  • Meals · 2025-07-21 · $29
See all 2 published payments
Every published payment
Mauna Kea TechnologiesMeals · 2025-07-21None$29
Phathom PharmaceuticalsMeals · 2025-05-05Voquezna$100
See earlier years (2024, 2023, 2022, 2021, 2020, 2019)

2024: $1,919

Payments by company in 2024
Alexion PharmaceuticalsNone$1,900
1 payment
  • Consulting · 2024-10-18 · $1,900
Regeneron Healthcare SolutionsDupixent$19
1 payment
  • Meals for Dupixent · 2024-05-20 · $19

2023: $188

Payments by company in 2023
Boston ScientificExalt Model D$149
1 payment
  • Meals for Exalt Model D · 2023-03-04 · $149
Bracco DiagnosticsVaribar Thin Liquid$40
1 payment
  • Meals for Varibar Thin Liquid · 2023-05-20 · $40

2022: $1,683

Payments by company in 2022
Sanofi US ServicesDupixent$1,493
1 payment
  • Consulting for Dupixent · 2022-04-18 · $1,493
MedtronicSignia$190
2 payments
  • Meals for Signia · 2022-09-16 · $168
  • Meals for Endoflip · 2022-05-22 · $23

2021: $6,987

Payments by company in 2021
PfizerNone$3,500
1 payment
  • Honoraria · 2021-10-11 · $3,500
Sanofi US ServicesDupixent$3,284
2 payments
  • Consulting for Dupixent · 2021-06-01 · $1,493
  • Consulting for Dupixent · 2021-01-05 · $1,791
MedtronicEsoflip$204
3 payments
  • Meals for Gi Genius · 2021-10-13 · $47
  • Meals for Gi Genius · 2021-10-13 · $8
  • Meals for Esoflip · 2021-02-09 · $149

2020: $18,249

Payments by company in 2020
Sanofi US ServicesDupixent$9,851
3 payments
  • Consulting for Dupixent · 2020-07-26 · $6,269
  • Consulting for Dupixent · 2020-07-26 · $1,791
  • Consulting for Dupixent · 2020-07-26 · $1,791
PfizerNone$5,000
1 payment
  • Honoraria · 2020-12-31 · $5,000
Alnylam PharmaceuticalsOxlumo$3,375
1 payment
  • Consulting for Oxlumo · 2020-12-15 · $3,375
Akcea TherapeuticsTegsedi$24
1 payment
  • Meals for Tegsedi · 2020-11-12 · $24

2019: $934

Payments by company in 2019
Sanofi US ServicesDupixent$934
2 payments
  • Meals for Dupixent · 2019-05-17 · $148
  • Travel for Dupixent · 2019-05-17 · $786

Research money

Money a company paid to run a study. Where it went to their institution, the clinician is named as an investigator and did not receive it; the amount covers the whole study, often across many sites.

Research payments by company and study
Medtronic, Inc. · 2021This clinician$6,600
Regeneron Pharmaceuticals, Inc. · Dupixent Clinical Development Program · 2024This clinician$6,550
IRONWOOD PHARMACEUTICALS, INC · 2021Their institution$4,476
IRONWOOD PHARMACEUTICALS, INC · 2020Their institution$3,646
Regeneron Pharmaceuticals, Inc. · Dupixent Clinical Development Program · 2025This clinician$3,275
Medtronic, Inc. · 2023This clinician$550
Medtronic, Inc. · Atlantic · 2021This clinician$400

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score
76.5 / 100
Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Professional record

NPI
1467539643
Licence
CA C143081, MD D58832California C143081: Current · expires 2028-06-30
Trained
University of Missouri, Columbia School of Medicine, 1999
Video visits
Lists video visits
Gender
Male
More record details
Sole proprietor
No
Medicaid ID
MD 411750600
Taxonomy
Federal specialty code 207RG0100X (207RG0100X); Internal medicine (207R00000X); Hospitalist (208M00000X)
Mailing address
300 Pasteur Dr, Palo Alto, CA, 94304
NPI first listed
2006-11-01
NPI last updated
2024-04-28
NPI record certified
2024-04-28

This is when the NPI record was last certified, not a medical board exam.

Extra NPI addresses: 600 N Wolfe St, Baltimore, MD, 21287