Sean P Spencer, MD
Gastroenterology · Stanford
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 9
- 1 carrier
- Office
- 1
Offices
1 location · Stanford Health Care · 3,152 clinicians in this group
Hospitals listed: Stanford Health Care. That is not proof they admit you there this week.
Plans that list them
9 plans · 1 carrier
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Spencer’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
| Alignment Health BreathEasy (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Clarity (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Harmony (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes CalPlus (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes Care (HMO C-SNP) | Alignment Health Plan | Listed | Sep 28, 2026 |
| Alignment Health Heart & Diabetes Choice (HMO C-SNP) | Alignment Health Plan | Listed | Sep 28, 2026 |
| Alignment Health Honor+ Plan (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health My Choice CalCare (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
California Medical Board record
Licence A149694 · Current
Licensed to practise in California · since 2017 · expires 2027-06-30 · Perelman School of Medicine at the University of Pennsylvania.
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 itOverall 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.
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 5.31 (4.24 to 6.37) · 8,661 cases | Worse | Jul 2022 – Jun 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 14.1 (12.7 to 15.7) · 2,191 cases | Worse | Jan 2024 – Dec 2024 |
| Postoperative respiratory failure rateComplications and deaths | 4.08 (1.95 to 6.21) · 5,296 cases | Better | Jul 2022 – Jun 2024 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.317 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.446 | Better | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 0.241 | Better | Oct 2024 – Sep 2025 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 0.7 (0.6 to 0.9) · 3,348 cases | Better | Jan 2024 – Dec 2024 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 1.06 (0.45 to 1.67) · 5,374 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 0.86 (0.72 to 1) | No different | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 166.09 (137.88 to 194.3) · 470 cases | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 1.1 · 192 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 6.4 · 146 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 9.7 · 253 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 6.3 · 880 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 10.3 · 935 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 8.7 · 501 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 2.1 · 7,730 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.13 (0 to 0.27) · 20,799 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.28 (0.14 to 0.43) · 23,182 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 0.94 (0.2 to 1.68) · 5,694 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.36 (1.54 to 3.19) · 7,846 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 5.2 (3.76 to 6.64) · 5,603 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.38 (0.23 to 2.53) · 2,211 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.52 (0.21 to 0.83) · 19,915 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 3.6 · 416 cases | None | Apr 2023 – Mar 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.869 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0.857 | No different | Oct 2024 – Sep 2025 |
| SSI - Abdominal HysterectomyInfections | 0.368 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 16.2 · 247 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 20.5 · 1,021 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | 47.8 · 258 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -1.6 · 990 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 20.8 · 976 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 16.5 · 959 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 5.2 (4.4 to 6.2) · 2,191 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 5.1 · 425 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 9.6 · 158 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 19.6 · 183 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 12.7 (10.4 to 15.4) · 4,578 cases | No different | Jan 2022 – Dec 2024 |
What patients said (6,810 patients answered, 25% of those asked)
| Cleanliness | 4 |
| Nurse communication | 4 |
| Doctor communication | 4 |
| Communication about medicines | 3 |
| Discharge information | 4 |
| Overall hospital rating | 4 |
| Quietness | 2 |
| Recommend hospital | 5 |
| Room was "always" clean | 75% |
| Nurses "always" communicated well | 82% |
| Doctors "always" communicated well | 81% |
| Staff "always" explained | 63% |
| Yes, staff "did" give patients this information | 89% |
| Yes, staff "did" give patients information about help after discharge | 89% |
| Doctors "always" explained things so they could understand | 76% |
| Doctors "always" listened carefully | 80% |
| Doctors "always" treated them with courtesy and respect | 87% |
| Patients who gave a rating of "9" or "10" (high) | 79% |
| Staff "always" explained new medications | 76% |
| Nurses "always" explained things so they could understand | 77% |
| Nurses "always" listened carefully | 79% |
| Nurses "always" treated them with courtesy and respect | 88% |
| "Always" quiet at night | 53% |
| "YES", patients would definitely recommend the hospital | 83% |
| Staff "always" explained possible side effects | 50% |
| Yes, staff "did" give patients information about possible symptoms | 90% |
Original Medicare doctor bills
$28,839
Medicare paid this office $28,839 for 135 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Long return visit (40+ min) | 42 | $7,782 | $147 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 33 | $5,030 | $152 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 16 | $3,794 | $237 |
| New patient visit (60+ min) | 17 | $2,985 | $176 |
| Biopsy of large bowel using a flexible endoscope | 21 | $1,513 | $72 |
See all 8 services
| Long return visit (40+ min) | 42 | $7,782 | $147 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 33 | $5,030 | $152 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 16 | $3,794 | $237 |
| New patient visit (60+ min) | 17 | $2,985 | $176 |
| Biopsy of large bowel using a flexible endoscope | 21 | $1,513 | $72 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 13 | $1,184 | $91 |
| 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's | 25 | $400 | $15 |
| 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 monito | 23 | $102 | $4 |
Procedures Medicare counted
| Colonoscopy | 28 | More than 53% of doctors who do this |
| Upper gastrointestinal (GI) endoscopy for acid reflux | 52 | More than 64% of doctors who do this |
Who their Medicare patients are
135 Original Medicare patients in 2024. Average age 71 · Under 65 15% · 85 and older 13% · Women 51% · Also on Medicaid 31% · Health risk score 1.47. Above the middle of the specialty; the typical gastroenterology clinician is at 1.42.
Conditions among them: High blood pressure 57% · Depression 30% · Coronary heart disease 28% · Chronic kidney disease 28% · Diabetes 25% · Heart failure 21% · Atrial fibrillation 21% · Cancer 17% · COPD 11% · Stroke 10%.
The office billed $260,719, Medicare allowed $36,532 and paid $28,839; for 266 services of 25 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
| 2024 | 135 | 266 | 71 | 1.47 | $260,719 | $28,839 |
| 2023 | 144 | 310 | 71 | 2.03 | $259,280 | $36,694 |
| 2022 | 131 | 260 | 72 | 2.38 | $234,914 | $29,454 |
| 2021 | 21 | 36 | 70 | 1.00 | $38,996 | $4,411 |
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: 6 services
| Long return visit (40+ min) | 44 | $7,465 | $124 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 30 | $6,985 | $107 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 30 | $4,778 | $159 |
| New patient visit (60+ min) | 27 | $3,955 | $146 |
| Biopsy of large bowel using a flexible endoscope | 14 | $1,924 | $137 |
| 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 monito | 15 | $77 | $5 |
2022: 6 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 18 | $3,777 | $92 |
| New patient visit (60+ min) | 22 | $3,586 | $163 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 20 | $3,555 | $178 |
| Long return visit (40+ min) | 16 | $2,551 | $121 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 11 | $2,507 | $228 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 13 | $1,513 | $66 |
2021: 1 service
| New patient visit (60+ min) | 11 | $1,591 | $145 |
Medicaid work
$1,850 in 2023
Medicaid paid $1,850 for 35 billed services this clinician did in 2023, up to 14 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.
| SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES | 35 | $1,850 |
| 2023 | 35 | 1 | 14 | $1,850 |
Drugs they prescribed that Part D paid
$95,339
Pharmacies billed $95,339 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 243) in 2024. At or below the middle of the specialty; the typical gastroenterology clinician is at 0%.
145 generic and 98 brand-name prescriptions · $95,339 in drug cost · 18 antibiotic prescriptions to 12 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.
| Xifaxan | 12 | $28,349 | $2,362 |
| Motegrity | 19 | $12,888 | $678 |
| Trulance | 16 | $10,669 | $667 |
| Linzess | 11 | $8,696 | $791 |
| Esomeprazole Magnesium | 28 | $1,687 | $60 |
See all 9 drugs
| Xifaxan | 12 | $28,349 | $2,362 |
| Motegrity | 19 | $12,888 | $678 |
| Trulance | 16 | $10,669 | $667 |
| Linzess | 11 | $8,696 | $791 |
| Esomeprazole Magnesium | 28 | $1,687 | $60 |
| Peg 3350-Electrolyte | 33 | $686 | $21 |
| Mirtazapine | 11 | $656 | $60 |
| Diphenoxylate-Atropine | 11 | $277 | $25 |
| Omeprazole | 19 | $209 | $11 |
Year by year
| 2024 | 243 | 98 | 0% (0) | 40% | $95,339 |
| 2023 | 179 | 71 | 0% (0) | 39% | $56,161 |
| 2022 | 57 | 42 | 0% (0) | 37% | $7,095 |
| 2021 | 49 | 21 | 0% (0) | None | $5,543 |
| 2020 | 34 | None | 0% (0) | None | $936 |
| 2019 | 16 | None | 0% (0) | None | $356 |
| 2018 | 14 | None | 0% (0) | None | $1,642 |
| 2017 | 348 | 34 | None | None | $30,410 |
| 2016 | 350 | 44 | None | None | $29,785 |
| 2015 | 68 | 16 | 0% (0) | 29% | $9,783 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 4 drugs
| Linzess | 31 | $18,083 | $583 |
| Motegrity | 11 | $5,935 | $540 |
| Peg 3350-Electrolyte | 18 | $468 | $26 |
| Omeprazole | 33 | $342 | $10 |
2022: 1 drug
| Peg 3350-Electrolyte | 20 | $451 | $23 |
2021: 1 drug
| Omeprazole | 20 | $353 | $18 |
2020: 1 drug
| Omeprazole | 19 | $166 | $9 |
2017: 9 drugs
| Metoprolol | 30 | $987 | $33 |
| Omeprazole | 24 | $677 | $28 |
| Tamsulosin | 23 | $455 | $20 |
| Warfarin | 12 | $326 | $27 |
| Atorvastatin | 11 | $230 | $21 |
| Metformin Hcl Er | 11 | $167 | $15 |
| Gabapentin | 13 | $74 | $6 |
| Quetiapine | 11 | $69 | $6 |
| Latanoprost | 13 | $49 | $4 |
2016: 7 drugs
| Omeprazole | 19 | $658 | $35 |
| Metoprolol | 21 | $585 | $28 |
| Tamsulosin | 18 | $446 | $25 |
| Atorvastatin | 19 | $287 | $15 |
| Warfarin | 12 | $154 | $13 |
| Metformin | 13 | $67 | $5 |
| Amlodipine Besylate | 11 | $64 | $6 |
Money from drug and device companies
$91 in 2025
| 2025 | 2 | 3 | None | $91 |
| 2024 | 2 | 12 | $3,052 | $4,907 |
| 2023 | 2 | 3 | None | $209 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Ardelyx | Ibsrela | $48 | 1 payment
|
| Mauna Kea Technologies | None | $43 | 2 payments
|
See all 3 published payments
| Mauna Kea Technologies | Meals · 2025-07-21 | None | $29 |
| Mauna Kea Technologies | Meals · 2025-05-09 | None | $14 |
| Ardelyx | Meals · 2025-02-15 | Ibsrela | $48 |
See earlier years (2024, 2023)
2024: $4,907
| Ferring Pharmaceuticals | Rebyota | $3,079 | 2 payments
|
| Mauna Kea Technologies | None | $1,828 | 7 payments
|
2023: $209
| AnX Robotica | None | $129 | 1 payment
|
| Ardelyx | Ibsrela | $81 | 2 payments
|
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
- 1235518176
- Licence
- CA A149694, MA L-263354California A149694: Current · expires 2027-06-30
- Group
- Stanford Health Care
- Video visits
- Lists video visits
- Gender
- Male
More record details
- Sole proprietor
- No
- Taxonomy
- Federal specialty code 207RG0100X (207RG0100X); Internal medicine (207R00000X)
- Mailing address
- 300 Pasteur Dr, Stanford, CA, 94305
- NPI first listed
- 2015-05-26
- NPI last updated
- 2024-04-17
- NPI record certified
- 2024-04-17
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: Massachusetts General Hospital, Boston, MA, 02114