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Gregg A Adams, MD

General Surgery · San Jose

NPI 1720175268

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
25
6 carriers
Office
1

Offices

1 location · County of Santa Clara · 1,000 clinicians in this group

Looking this up.

Hospitals listed: Santa Clara Valley Medical Center. That is not proof they admit you there this week.

Plans that list them

25 plans · 6 carriers

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Adams’s office at (408) 885-5000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

25 of 25 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
Anthem Full Dual Advantage Aligned (HMO D-SNP)Anthem Blue CrossListedOct 3, 2026
Anthem Medicare Advantage (HMO-POS)Anthem Blue CrossListedOct 3, 2026
Anthem Prime (HMO-POS)Anthem Blue Cross Partnership PlanListedOct 3, 2026
Central Health Classic Care Plan III (HMO)Central Health Medicare PlanListedAug 15, 2026
Central Health Dual Access Plan (HMO D-SNP)Central Health Medicare PlanListedAug 15, 2026
Central Health Embrace Care Plan (HMO C-SNP)Central Health Medicare PlanListed, may be out of dateSep 15, 2025
Central Health Embrace Choice Plan (HMO C-SNP)Central Health Medicare PlanListedAug 15, 2026
Central Health Valor Care Plan (HMO)Central Health Medicare PlanListedAug 15, 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 G70824 · Current

Licensed to practise in California · since 1991 · expires 2028-09-30 · Oregon Health Sciences University.

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.

  • Santa Clara Valley Medical CenterSan Jose, CAAcute Care Hospital · Government - Local · Has an emergency department · Birthing-friendlyPart of Santa Clara Valley Health and Hospital System, which runs 3 hospitalsPatients rate it 3 of 5 · 70% would definitely recommend it
    Overall rating: 2 of 5 starsWorse than the national rate — SSI - Colon Surgery: 2.572, Oct 2024 – Sep 2025Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.563, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.256, Oct 2024 – Sep 2025Better than the national rate — MRSA Bacteremia: 0.369, Oct 2024 – Sep 2025
See every measure and the patient survey for Santa Clara Valley Medical Center

Behind the star rating — Deaths: 2 better, 6 the same, 0 worse of 8 measures. Safety: 2 better, 5 the same, 1 worse of 8 measures. Readmissions: 0 better, 10 the same, 1 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 Santa Clara Valley Medical Center
SSI - Colon SurgeryInfections2.572WorseOct 2024 – Sep 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.563BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.256BetterOct 2024 – Sep 2025
MRSA BacteremiaInfections0.369BetterOct 2024 – Sep 2025
Abdominopelvic accidental puncture or laceration rateComplications and deaths1.25 (0.3 to 2.2) · 1,535 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths1.07 (0.76 to 1.38)No differentJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths214.59 (167.38 to 261.8) · 108 casesNo differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths2.8 · 41 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths6 · 141 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths10.2 · 124 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths8.3 · 501 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths14.9 · 653 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths10.1 · 348 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths3 · 4,502 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.24 (0.04 to 0.43) · 9,014 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.34 (0.15 to 0.52) · 9,216 casesNo differentJul 2022 – Jun 2024
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths4.54 (2.51 to 6.58) · 1,421 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths1.54 (0 to 3.2) · 288 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2.11 (0.66 to 3.56) · 1,446 casesNo differentJul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths11.61 (4.09 to 19.14) · 294 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths7.29 (3.39 to 11.2) · 299 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.9 (0.45 to 3.36) · 333 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.23 (0 to 0.78) · 7,538 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths5.4 · 94 casesNoneApr 2023 – Mar 2025
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.735No differentOct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections2.573No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits14.6 · 185 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits22.1 · 951 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits56.3 · 128 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits6.4 · 644 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits1.3 · 699 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits16.3 · 921 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits5.7 (3.9 to 8.1) · 226 casesNo differentJan 2024 – Dec 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits12.6 (9.4 to 16.5) · 226 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits5.4 · 94 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits11.4 · 54 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits20.3 · 242 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits13.2 (9.9 to 17.4) · 702 casesNo differentJan 2022 – Dec 2024
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits1 (0.7 to 1.4) · 195 casesNo differentJan 2024 – Dec 2024

What patients said (4,032 patients answered, 29% of those asked)

Patient survey stars by topic at Santa Clara Valley Medical Center
Cleanliness3
Nurse communication3
Doctor communication3
Communication about medicines3
Discharge information2
Overall hospital rating3
Quietness2
Recommend hospital4
Share of patients giving the best answer at Santa Clara Valley Medical Center
Room was "always" clean70%
Nurses "always" communicated well73%
Doctors "always" communicated well76%
Staff "always" explained57%
Yes, staff "did" give patients this information82%
Yes, staff "did" give patients information about help after discharge82%
Doctors "always" explained things so they could understand71%
Doctors "always" listened carefully74%
Doctors "always" treated them with courtesy and respect82%
Patients who gave a rating of "9" or "10" (high)67%
Staff "always" explained new medications71%
Nurses "always" explained things so they could understand71%
Nurses "always" listened carefully69%
Nurses "always" treated them with courtesy and respect80%
"Always" quiet at night43%
"YES", patients would definitely recommend the hospital70%
Staff "always" explained possible side effects44%
Yes, staff "did" give patients information about possible symptoms83%

Original Medicare doctor bills

$9,387

Medicare paid this office $9,387 for 148 people.

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

Largest Original Medicare bills
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes53$3,449$43
Short return visit69$2,425$31
New patient visit (45+ min)11$1,295$118

Procedures Medicare counted

Procedure volume Medicare published
Colonoscopy1-10None
Hernia repair - groin (open)1-10None
Removal of tissue1-10None

Who their Medicare patients are

148 Original Medicare patients in 2024. Average age 75 · Under 65 13% · 85 and older 22% · Women 47% · Also on Medicaid 57% · Health risk score 2.03. Above the middle of the specialty; the typical general surgery clinician is at 1.69.

Conditions among them: High blood pressure 75% · Diabetes 37% · Depression 33% · Chronic kidney disease 28% · Atrial fibrillation 28% · Heart failure 27% · Coronary heart disease 26% · Stroke 26% · Dementia 24% · Cancer 16% · COPD 15%.

The office billed $79,618, Medicare allowed $12,500 and paid $9,387; for 204 services of 12 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
2024148204752.03$79,618$9,387
202370101722.12$48,702$5,188
2022113205741.62$207,364$20,778
2021154314741.88$325,961$33,317
2020110182702.42$215,207$21,841
2019138244711.80$155,566$17,774
2018126246732.22$153,909$21,500
2017106226711.78$174,652$25,439
2016115248712.81$156,682$22,788
2015116221681.80$196,519$23,131
2014153294671.79$217,296$31,419
2013115220691.89$121,329$20,377

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: 3 services

Original Medicare services billed in 2023
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes17$1,174$43
Return visit (30+ min)17$1,172$65
Short return visit24$985$30

2022: 5 services

Original Medicare services billed in 2022
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes47$4,112$42
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes16$2,299$144
Hospital discharge day management, 30 minutes or less14$1,102$79
Telephone medical discussion with physician, 11-20 minutes11$679$62
Short return visit12$485$32

2021: 5 services

Original Medicare services billed in 2021
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes81$6,529$42
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes19$2,662$140
Hospital discharge day management, 30 minutes or less28$2,197$78
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes20$1,956$98
Short return visit18$656$35

2020: 4 services

Original Medicare services billed in 2020
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes36$2,753$41
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes23$2,325$101
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes13$1,883$145
Return visit (30+ min)13$907$65

2019: 5 services

Original Medicare services billed in 2019
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes55$4,021$34
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes22$2,452$111
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes16$1,459$91
New patient visit (45+ min)13$1,393$107
Return visit (30+ min)16$1,153$68

2018: 5 services

Original Medicare services billed in 2018
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes53$4,268$34
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes17$1,833$108
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes14$1,257$90
New patient visit (45+ min)13$1,022$79
Short return visit11$182$13

2017: 4 services

Original Medicare services billed in 2017
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes45$3,275$33
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes18$1,831$102
Return visit (30+ min)13$846$60
Short return visit14$318$20

2016: 5 services

Original Medicare services billed in 2016
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes58$4,046$33
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes17$1,921$113
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes23$1,858$81
Return visit (30+ min)19$1,175$59
Hospital discharge day management, 30 minutes or less13$829$64

2015: 4 services

Original Medicare services billed in 2015
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes41$3,092$32
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes19$1,962$103
Return visit (30+ min)20$1,268$58
Short return visit22$554$20

2014: 6 services

Original Medicare services billed in 2014
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes51$3,586$33
Return visit (30+ min)42$2,622$62
Initial hospital care with moderate level of medical decision making at least 75 minutes11$1,748$159
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes18$1,518$84
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes18$1,392$77
Short return visit21$446$17

2013: 4 services

Original Medicare services billed in 2013
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes53$3,221$34
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes20$1,837$83
Return visit (30+ min)13$815$58
Short return visit22$482$17

Medicaid work

$8,085 in 2024

Medicaid paid $8,085 for 1,414 billed services this clinician did in 2024, up to 84 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
OFF/OP CNSLTJ NEW/EST MOD 40135$3,497
Short return visit174$2,108
SBSQ HOSPITAL IP/OBS CARE SF/LOW MDM 25 MINUTES148$2,037
Service13$443
Discharge medications reconciled with the current medication list in outpatient medical record (COA) (GER)12$0
Medication list documented in medical record (COA)284$0
Review of all medications by a prescribing practitioner or clinical pharmacist (such as, prescriptions, OTCs, herbal therapies and supplements) documented in the medical record (COA)273$0
Most recent systolic blood pressure less than 130 mm Hg (DM) (HTN, CKD, CAD)111$0
Most recent systolic blood pressure 130-139 mm Hg (DM) (HTN, CKD, CAD)31$0
Most recent systolic blood pressure greater than or equal to 140 mm Hg (HTN, CKD, CAD) (DM)40$0
Most recent diastolic blood pressure less than 80 mm Hg (HTN, CKD, CAD) (DM)109$0
Most recent diastolic blood pressure 80-89 mm Hg (HTN, CKD, CAD) (DM)59$0
Medicaid work by year
20241,4141384$8,085
2023259354$2,863
2022249343$5,623
2021365527$5,667
2020130122$2,281
2019217227$3,450
2018151218$1,989
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
OFF/OP CNSLTJ NEW/EST MOD 40104$1,737
Short return visit95$648
SBSQ HOSPITAL IP/OBS CARE SF/LOW MDM 25 MINUTES60$478

2022

Largest Medicaid services in 2022
SBSQ HOSPITAL IP/OBS CARE SF/LOW MDM 25 MINUTES163$3,561
OFF/OP CNSLTJ NEW/EST MOD 4057$1,844
Short return visit29$217

2021

Largest Medicaid services in 2021
SBSQ HOSPITAL IP/OBS CARE SF/LOW MDM 25 MINUTES250$4,429
1ST HOSPITAL IP/OBS CARE MODERATE MDM 55 MINUTES13$515
Hospital inpatient or observation discharge day management; 30 minutes or less on the date of the encounter12$327
Short return visit63$258
Short return visit (20+ min)27$137

2020

Largest Medicaid services in 2020
SBSQ HOSPITAL IP/OBS CARE SF/LOW MDM 25 MINUTES130$2,281

2019

Largest Medicaid services in 2019
SBSQ HOSPITAL IP/OBS CARE SF/LOW MDM 25 MINUTES201$3,010
1ST HOSPITAL IP/OBS CARE MODERATE MDM 55 MINUTES16$439

2018

Largest Medicaid services in 2018
SBSQ HOSPITAL IP/OBS CARE SF/LOW MDM 25 MINUTES113$1,416
OFF/OP CNSLTJ NEW/EST MOD 4038$573

Drugs they prescribed that Part D paid

$751

Pharmacies billed $751 in 2024.

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

40 generic and fewer than 11 brand-name prescriptions · $751 in drug cost.

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
Gabapentin11$84$8

Year by year

Part D prescribing by year
20244217NoneNone$751
20232615NoneNone$310
20223111NoneNone$1,929
202139180% (0)None$2,162
20201712NoneNone$641
201921None0% (0)None$415
20184820NoneNone$1,872
20174515None0%$1,128
20161712NoneNone$137
201513NoneNoneNone$246
20142112NoneNone$1,469
2013251448% (12)0%$336

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

See the drugs prescribed each year

2018: 1 drug

Part D drugs prescribed in 2018
Polyethylene Glycol 335011$178$16

Money from drug and device companies

$7 in 2024

Industry payments by year
202411None$7
202111None$33,591

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
BTG InternationalDigifab$7
1 payment
  • Education for Digifab · 2024-08-02 · $7
See the published payment
Every published payment
BTG InternationalEducation · 2024-08-02Digifab$7
See earlier years (2021)

2021: $33,591

Payments by company in 2021
StrykerNone$33,591
1 payment
  • Acquisitions · 2021-12-15 · $33,591

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score
80.6 / 100
Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Professional record

NPI
1720175268
Licence
CA G70824California G70824: Current · expires 2028-09-30
Trained
Oregon Health Sciences University School of Medicine, 1988
Video visits
Lists video visits
Gender
Male
More record details
Sole proprietor
No
Medicaid ID
CA 00G708240
Taxonomy
Surgery (208600000X); Federal specialty code 2086S0127X (2086S0127X)
Mailing address
751 S Bascom Ave, General Sugery Dept, San Jose, CA, 95128
NPI first listed
2006-10-06
NPI last updated
2007-09-10

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