Michael A Pfeffer, MD
Internal Medicine · Stanford
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 1
- 1 carrier
- Office
- 1
Offices
1 location · 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
1 plan · 1 carrier
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Pfeffer’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
| DualConnect (HMO D-SNP) | Santa Clara Family Health Plan | Listed | Sep 1, 2026 |
California Medical Board record
Licence A93075 · Current
Licensed to practise in California · since 2005 · expires 2027-10-31 · Cornell University Medical College.
No disciplinary actions, convictions, malpractice judgments or citations in this record.
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.
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
$7,033
Medicare paid this office $7,033 for 22 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 11 | $2,981 | $106 |
Who their Medicare patients are
22 Original Medicare patients in 2024. Average age 70 · Health risk score 3.18. Sicker patients than 9 in 10 peers; the typical internal medicine clinician is at 1.76.
Conditions among them: High blood pressure 75% · Chronic kidney disease 59% · Diabetes 55%.
The office billed $34,553, Medicare allowed $8,969 and paid $7,033; for 74 services of 7 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 | 22 | 74 | 70 | 3.18 | $34,553 | $7,033 |
| 2023 | 46 | 132 | 75 | 3.19 | $53,044 | $13,146 |
| 2022 | 40 | 120 | 74 | 2.77 | $43,942 | $11,003 |
| 2021 | 41 | 116 | 68 | 4.32 | $59,875 | $10,381 |
| 2020 | 74 | 246 | 69 | 4.15 | $104,165 | $20,453 |
| 2019 | 58 | 176 | 72 | 4.52 | $76,565 | $14,598 |
| 2018 | 62 | 189 | 70 | 4.47 | $86,410 | $16,471 |
| 2017 | 73 | 232 | 72 | 4.12 | $97,720 | $20,347 |
| 2016 | 66 | 188 | 71 | 4.10 | $64,437 | $15,705 |
| 2015 | 72 | 192 | 68 | 3.69 | $59,980 | $15,746 |
| 2014 | 63 | 171 | 70 | 4.65 | $53,089 | $14,246 |
| 2013 | 52 | 161 | 72 | 3.94 | $48,225 | $13,018 |
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: 4 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 15 | $3,949 | $110 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 22 | $3,497 | $152 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 23 | $3,408 | $73 |
| Hospital discharge day management, 30 minutes or less | 17 | $1,290 | $76 |
2022: 3 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 23 | $3,302 | $65 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 16 | $2,880 | $180 |
| Hospital discharge day management, 30 minutes or less | 16 | $1,068 | $67 |
2021: 4 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 19 | $2,675 | $64 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 14 | $2,469 | $176 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 12 | $1,892 | $90 |
| Hospital discharge day management, 30 minutes or less | 20 | $1,283 | $64 |
2020: 4 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 46 | $7,463 | $62 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 27 | $4,612 | $171 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 31 | $4,590 | $90 |
| Hospital discharge day management, 30 minutes or less | 32 | $1,999 | $62 |
2019: 4 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 26 | $4,390 | $88 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 31 | $3,677 | $60 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 20 | $3,268 | $163 |
| Hospital discharge day management, 30 minutes or less | 33 | $2,035 | $62 |
2018: 4 services
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 30 | $4,955 | $165 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 25 | $4,080 | $89 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 31 | $3,936 | $62 |
| Hospital discharge day management, 30 minutes or less | 35 | $2,152 | $61 |
2017: 4 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 29 | $6,388 | $89 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 31 | $5,456 | $170 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 35 | $4,973 | $61 |
| Hospital discharge day management, 30 minutes or less | 27 | $1,679 | $62 |
2016: 4 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 25 | $5,420 | $85 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 28 | $4,793 | $165 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 33 | $2,809 | $50 |
| Hospital discharge day management, 30 minutes or less | 29 | $1,793 | $62 |
2015: 4 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 43 | $5,531 | $60 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 27 | $4,772 | $170 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 21 | $2,304 | $85 |
| Hospital discharge day management, 30 minutes or less | 29 | $1,686 | $58 |
2014: 4 services
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 26 | $4,415 | $170 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 34 | $4,222 | $59 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 20 | $3,130 | $87 |
| Hospital discharge day management, 30 minutes or less | 28 | $1,711 | $61 |
2013: 4 services
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 27 | $4,429 | $164 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 30 | $4,323 | $57 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 14 | $2,047 | $82 |
| Hospital discharge day management, 30 minutes or less | 25 | $1,484 | $59 |
Medicaid work
$724 in 2022
Medicaid paid $724 for 43 billed services this clinician did in 2022, up to 12 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 MOD MDM 35 MINUTES | 43 | $724 |
| 2022 | 43 | 1 | 12 | $724 |
Money from drug and device companies
$100 in 2025
| 2025 | 1 | 1 | None | $100 |
| 2023 | 1 | 1 | None | $103 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Baxter Healthcare | None | $100 | 1 payment
|
See the published payment
| Baxter Healthcare | Meals · 2025-04-23 | None | $100 |
See earlier years (2023)
2023: $103
| Gilead Sciences | None | $103 | 1 payment
|
Professional record
- NPI
- 1952434607
- Licence
- CA A93075California A93075: Current · expires 2027-10-31
- Trained
- Js Weill Medical College, Cornell University, 2004
- Group
- Stanford Health Care
- Gender
- Male
More record details
- Sole proprietor
- No
- Medicaid ID
- CA 00A930750
- Taxonomy
- Internal medicine (207R00000X); Federal specialty code 2083C0008X (2083C0008X); Hospitalist (208M00000X)
- Mailing address
- 300 Pasteur Dr, Stanford, CA, 94305
- NPI first listed
- 2007-03-13
- NPI last updated
- 2024-04-23
- NPI record certified
- 2024-04-23
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 757 Westwood Plz, Los Angeles, CA, 90095