Frederick M Dirbas, MD
General Surgery · Stanford
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 17
- 3 carriers
- 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
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. Dirbas’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
17 of 17 plans
| 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 |
| Alignment Health Silicon (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health smartHMO (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health the ONE (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| SCAN Balance (HMO C-SNP) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN Classic (HMO) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN MyChoice (HMO) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN Strive (HMO C-SNP) | SCAN Health Plan | Listed | Oct 3, 2026 |
| DualConnect (HMO D-SNP) | Santa Clara Family Health Plan | Listed | Sep 1, 2026 |
California Medical Board record
Licence G58935 · Current
Licensed to practise in California · since 1986 · expires 2028-04-30 · 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 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
$35,276
Medicare paid this office $35,276 for 49 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Partial removal of breast | 32 | $21,237 | $590 |
| Long return visit (40+ min) | 11 | $1,439 | $131 |
Procedures Medicare counted
| Mastectomy | 44 | More than 93% of doctors who do this |
| Skin biopsy | 1-10 | None |
Who their Medicare patients are
49 Original Medicare patients in 2024. Average age 75 · Women 100% · Health risk score 0.87. At or below the middle of the specialty; the typical general surgery clinician is at 1.69.
Conditions among them: Cancer 75% · High blood pressure 63% · Coronary heart disease 31% · Diabetes 24%.
The office billed $169,971, Medicare allowed $44,243 and paid $35,276; for 93 services of 17 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 | 49 | 93 | 75 | 0.87 | $169,971 | $35,276 |
| 2023 | 100 | 192 | 76 | 0.95 | $176,647 | $40,486 |
| 2022 | 106 | 245 | 74 | 0.89 | $253,822 | $51,590 |
| 2021 | 75 | 166 | 73 | 0.78 | $172,134 | $34,281 |
| 2020 | 68 | 135 | 75 | 1.18 | $117,636 | $25,233 |
| 2019 | 121 | 248 | 74 | 0.94 | $183,953 | $46,122 |
| 2018 | 145 | 328 | 72 | 0.94 | $299,332 | $71,061 |
| 2017 | 104 | 205 | 71 | 0.85 | $141,205 | $34,505 |
| 2016 | 126 | 237 | 71 | 0.87 | $213,345 | $45,563 |
| 2015 | 123 | 252 | 71 | 0.87 | $239,048 | $49,482 |
| 2014 | 131 | 286 | 71 | 0.87 | $268,490 | $52,616 |
| 2013 | 120 | 259 | 71 | 1.02 | $218,245 | $47,812 |
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
| Partial removal of breast | 23 | $14,837 | $593 |
| Biopsy or removal of deep lymph nodes of underarm | 17 | $3,483 | $205 |
| Imaging of lymph nodes during surgery | 14 | $1,663 | $119 |
| Short return visit | 52 | $1,565 | $30 |
| Short return visit (20+ min) | 22 | $1,549 | $60 |
| Return visit (30+ min) | 15 | $1,409 | $88 |
2022: 8 services
| Partial removal of breast | 31 | $21,885 | $625 |
| Biopsy or removal of deep lymph nodes of underarm | 20 | $4,025 | $201 |
| Imaging of lymph nodes during surgery | 17 | $1,967 | $116 |
| Short return visit (20+ min) | 26 | $1,735 | $58 |
| Short return visit | 38 | $1,505 | $31 |
| Return visit (30+ min) | 13 | $1,216 | $87 |
| New patient visit (30+ min) | 16 | $1,152 | $72 |
| New patient visit (15+ min) | 17 | $718 | $42 |
2021: 5 services
| Partial removal of breast | 16 | $11,938 | $628 |
| Biopsy or removal of deep lymph nodes of underarm | 13 | $2,994 | $230 |
| Imaging of lymph nodes during surgery | 12 | $1,521 | $127 |
| Short return visit | 28 | $1,000 | $29 |
| Short return visit (20+ min) | 16 | $944 | $56 |
2020: 4 services
| Partial removal of breast | 11 | $7,928 | $661 |
| New patient visit (45+ min) | 16 | $1,918 | $120 |
| Short return visit (20+ min) | 18 | $1,063 | $48 |
| Short return visit | 35 | $811 | $21 |
2019: 7 services
| Partial removal of breast | 23 | $16,160 | $599 |
| Biopsy or removal of deep lymph nodes of underarm | 16 | $3,187 | $199 |
| New patient visit (60+ min) | 23 | $3,176 | $138 |
| Imaging of lymph nodes during surgery | 18 | $2,151 | $120 |
| Short return visit | 62 | $1,387 | $20 |
| Short return visit (20+ min) | 27 | $1,300 | $42 |
| Return visit (30+ min) | 13 | $861 | $66 |
2018: 10 services
| Partial removal of breast | 37 | $27,387 | $571 |
| Simple complete removal of breast | 14 | $13,100 | $936 |
| New patient visit (60+ min) | 47 | $7,074 | $151 |
| Biopsy or removal of deep lymph nodes of underarm | 26 | $5,570 | $214 |
| Removal of growth of breast identified by x-ray marker, first growth | 16 | $5,534 | $346 |
| Short return visit (20+ min) | 38 | $1,990 | $44 |
| New patient visit (45+ min) | 12 | $1,327 | $111 |
| Long return visit (40+ min) | 15 | $1,297 | $81 |
| Return visit (30+ min) | 19 | $1,206 | $63 |
| Short return visit | 38 | $933 | $21 |
2017: 6 services
| Partial removal of breast | 15 | $9,794 | $544 |
| New patient visit (60+ min) | 25 | $3,758 | $150 |
| Biopsy or removal of deep lymph nodes of underarm | 12 | $2,637 | $220 |
| Short return visit (20+ min) | 32 | $2,191 | $45 |
| Return visit (30+ min) | 18 | $1,481 | $67 |
| Short return visit | 30 | $772 | $21 |
2016: 6 services
| Partial removal of breast | 24 | $17,022 | $549 |
| New patient visit (60+ min) | 28 | $4,192 | $150 |
| Long return visit (40+ min) | 28 | $3,225 | $87 |
| Biopsy or removal of deep lymph nodes of underarm | 15 | $3,115 | $208 |
| Short return visit (20+ min) | 60 | $2,461 | $38 |
| Return visit (30+ min) | 19 | $1,452 | $69 |
2015: 7 services
| Simple complete removal of breast | 17 | $14,802 | $871 |
| Partial removal of breast | 23 | $12,681 | $528 |
| New patient visit (60+ min) | 32 | $4,423 | $138 |
| Biopsy or removal of deep lymph nodes of underarm | 20 | $4,179 | $209 |
| Long return visit (40+ min) | 33 | $4,069 | $92 |
| Short return visit (20+ min) | 64 | $2,664 | $37 |
| Return visit (30+ min) | 18 | $1,122 | $59 |
2014: 5 services
| Partial removal of breast | 26 | $20,003 | $526 |
| New patient visit (60+ min) | 33 | $4,936 | $150 |
| Long return visit (40+ min) | 28 | $4,183 | $95 |
| Short return visit (20+ min) | 74 | $3,517 | $40 |
| Biopsy or removal of deep lymph nodes of underarm | 14 | $2,909 | $208 |
2013: 8 services
| Partial removal of breast | 23 | $16,253 | $580 |
| New patient visit (60+ min) | 21 | $2,993 | $143 |
| Biopsy or removal of deep lymph nodes of underarm | 12 | $2,544 | $212 |
| New patient visit (60+ min) | 15 | $2,364 | $158 |
| Long return visit (40+ min) | 18 | $2,098 | $95 |
| Short return visit (20+ min) | 45 | $2,017 | $42 |
| Short return visit (20+ min) | 28 | $1,631 | $56 |
| Return visit (30+ min) | 16 | $1,150 | $68 |
Money from drug and device companies
$104 in 2024
| 2024 | 1 | 1 | None | $104 |
| 2022 | 1 | 1 | None | $136 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Intuitive Surgical | Da Vinci Surgical System | $104 | 1 payment
|
See the published payment
| Intuitive Surgical | Meals · 2024-04-16 | Da Vinci Surgical System | $104 |
See earlier years (2022)
2022: $136
| Sientra | Sientra High Strength Cohesive Silicone Gel Breast Implant | $136 | 1 payment
|
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
- 1154457091
- Licence
- CA G58935California G58935: Current · expires 2028-04-30
- Trained
- Columbia University College of Physicians and Surgeons, 1985
- Group
- Stanford Health Care
- Video visits
- Lists video visits
- Gender
- Male
More record details
- Sole proprietor
- No
- Taxonomy
- Surgery (208600000X)
- Mailing address
- 300 Pasteur Dr, Palo Alto, CA, 94304
- NPI first listed
- 2007-02-26
- 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.