Kazunari Sasaki, MD
General Surgery · Stanford
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 14
- 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
14 plans · 3 carriers
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Sasaki’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
14 of 14 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 |
| Anthem Full Dual Advantage Aligned (HMO D-SNP) | Anthem Blue Cross | Listed | Oct 3, 2026 |
| DualConnect (HMO D-SNP) | Santa Clara Family Health Plan | Listed | Sep 1, 2026 |
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
$75,781
Medicare paid this office $75,781 for 39 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Transplantation of donor liver | 15 | $52,175 | $3,478 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes | 25 | $4,522 | $43 |
| Preparation of donor liver for transplantation | 13 | $1,764 | $136 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 12 | $1,706 | $142 |
Who their Medicare patients are
39 Original Medicare patients in 2024. Average age 63 · Women 39% · Also on Medicaid 64% · Health risk score 3.39. Sicker patients than 9 in 10 peers; the typical general surgery clinician is at 1.69.
Conditions among them: High blood pressure 75% · Diabetes 51% · Chronic kidney disease 51% · Coronary heart disease 33%.
The office billed $880,466, Medicare allowed $95,743 and paid $75,781; for 190 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 | 39 | 190 | 63 | 3.39 | $880,466 | $75,781 |
| 2023 | 48 | 269 | 64 | 3.38 | $1,158,848 | $105,199 |
| 2022 | 41 | 214 | 63 | 3.58 | $716,614 | $76,494 |
| 2021 | 45 | 123 | 65 | 4.71 | $356,348 | $43,803 |
| 2020 | 46 | 140 | 69 | 3.58 | $315,154 | $41,425 |
| 2019 | 46 | 147 | 66 | 4.07 | $225,735 | $30,610 |
| 2018 | 27 | 127 | 62 | 3.31 | $102,284 | $13,631 |
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
| Transplantation of donor liver | 25 | $81,611 | $3,264 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 20 | $6,626 | $70 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes | 13 | $3,619 | $44 |
| Preparation of donor liver for transplantation | 11 | $1,488 | $135 |
2022: 3 services
| Transplantation of donor liver | 18 | $54,209 | $3,012 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 21 | $9,877 | $92 |
| Preparation of donor liver for transplantation | 12 | $1,645 | $137 |
2021: 2 services
| Short return visit (20+ min) | 14 | $960 | $53 |
| Hospital discharge day management, 30 minutes or less | 11 | $676 | $56 |
2020: 2 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 22 | $6,118 | $83 |
| Short return visit (20+ min) | 20 | $1,307 | $40 |
2019: 3 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 18 | $4,291 | $79 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 15 | $2,605 | $57 |
| Short return visit (20+ min) | 17 | $639 | $34 |
2018: 1 service
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 18 | $5,739 | $57 |
Drugs they prescribed that Part D paid
$31,460
Pharmacies billed $31,460 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 408) in 2024. At or below the middle of the specialty; the typical general surgery clinician is at 34%.
321 generic and 43 brand-name prescriptions · $31,460 in drug cost · 65 antibiotic prescriptions to 15 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.
| Tacrolimus | 23 | $4,953 | $215 |
| Valganciclovir | 26 | $4,797 | $184 |
| Comfort Ez Pen Needle | 16 | $2,383 | $149 |
| Ultra-Fine Mini Pen Needle | 14 | $1,245 | $89 |
| Nystatin | 19 | $857 | $45 |
See all 8 drugs
| Tacrolimus | 23 | $4,953 | $215 |
| Valganciclovir | 26 | $4,797 | $184 |
| Comfort Ez Pen Needle | 16 | $2,383 | $149 |
| Ultra-Fine Mini Pen Needle | 14 | $1,245 | $89 |
| Nystatin | 19 | $857 | $45 |
| Pantoprazole | 42 | $147 | $4 |
| Sulfamethoxazole-Trimethoprim | 49 | $76 | $2 |
| Amoxicillin | 12 | $66 | $5 |
Year by year
| 2024 | 408 | 27 | 0% (0) | 11% | $31,460 |
| 2023 | 174 | 21 | 0% (0) | 16% | $33,090 |
| 2022 | 365 | 31 | None | 18% | $104,429 |
| 2021 | 126 | 29 | 0% (0) | None | $13,370 |
| 2020 | 75 | 23 | 0% (0) | None | $20,297 |
| 2019 | 134 | 22 | None | 10% | $46,547 |
| 2018 | 14 | None | 0% (0) | None | $340 |
| 2016 | 11 | None | 0% (0) | None | $5,630 |
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
| Atovaquone | 11 | $10,614 | $965 |
| Fludrocortisone Acetate | 11 | $108 | $10 |
| Pantoprazole | 11 | $89 | $8 |
| Sulfamethoxazole-Trimethoprim | 14 | $72 | $5 |
2022: 9 drugs
| Atovaquone | 17 | $20,489 | $1,205 |
| Valganciclovir | 23 | $20,023 | $871 |
| Vemlidy | 11 | $15,419 | $1,402 |
| Comfort Ez Pen Needle | 16 | $2,796 | $175 |
| Nystatin | 27 | $2,206 | $82 |
| Sulfamethoxazole-Trimethoprim | 52 | $347 | $7 |
| Pantoprazole | 35 | $299 | $9 |
| Levothyroxine | 17 | $185 | $11 |
| Levetiracetam | 14 | $113 | $8 |
2021: 3 drugs
| Lamivudine Hbv | 23 | $3,263 | $142 |
| Tacrolimus | 16 | $2,349 | $147 |
| Sulfamethoxazole-Trimethoprim | 27 | $199 | $7 |
2020: 2 drugs
| Tacrolimus | 25 | $6,643 | $266 |
| Sulfamethoxazole-Trimethoprim | 16 | $75 | $5 |
2019: 2 drugs
| Sulfamethoxazole-Trimethoprim | 38 | $152 | $4 |
| Pantoprazole | 19 | $100 | $5 |
Money from drug and device companies
$9,773 in 2025
| 2025 | 3 | 11 | $8,190 | $9,773 |
| 2024 | 3 | 4 | $2,148 | $4,644 |
| 2023 | 3 | 8 | $9,592 | $10,018 |
| 2022 | 4 | 38 | $3,535 | $9,196 |
| 2021 | 1 | 1 | None | $87 |
| 2019 | 4 | 9 | None | $1,843 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Ethicon | Vistaseal | $8,190 | 1 payment
|
| Medical Device Business Services | None | $1,068 | 6 payments
|
| Intuitive Surgical | Da Vinci Surgical System | $515 | 4 payments
|
See all 11 published payments
| Ethicon | Consulting · 2025-11-21 | Vistaseal | $8,190 |
| Medical Device Business Services | Meals · 2025-10-03 | None | $5 |
| Medical Device Business Services | Meals · 2025-10-03 | None | $5 |
| Medical Device Business Services | Meals · 2025-10-03 | None | $26 |
| Medical Device Business Services | Meals · 2025-10-03 | None | $42 |
| Medical Device Business Services | Travel · 2025-10-02 | None | $294 |
| Medical Device Business Services | Travel · 2025-10-02 | None | $696 |
| Intuitive Surgical | Meals · 2025-08-12 | Da Vinci Surgical System | $24 |
| Intuitive Surgical | Travel · 2025-06-03 | Da Vinci Surgical System | $199 |
| Intuitive Surgical | Travel · 2025-05-30 | Da Vinci Surgical System | $273 |
| Intuitive Surgical | Travel · 2025-05-30 | Da Vinci Surgical System | $19 |
See earlier years (2024, 2023, 2022, 2021, 2019)
2024: $4,644
| TransMedics | Organ Care System | $2,412 | 1 payment
|
| AstraZeneca Pharmaceuticals LP | None | $2,157 | 2 payments
|
| Ethicon US | Echelon Flex | $76 | 1 payment
|
2023: $10,018
| Ethicon US | Echelon Flex | $8,899 | 5 payments
|
| Ethicon | Vistaseal | $1,079 | 2 payments
|
| Intuitive Surgical | Da Vinci Surgical System | $40 | 1 payment
|
2022: $9,196
| Intuitive Surgical | Davinci Xi | $5,264 | 32 payments
|
| Ethicon | Vistaseal | $2,020 | 1 payment
|
| Ethicon US | Echelon Flex | $1,764 | 3 payments
|
| Medtronic | Gi Genius | $149 | 2 payments
|
2021: $87
| Ethicon US | Surgicel Nu-Knit | $87 | 1 payment
|
2019: $1,843
| Covidien LP | Emprint | $1,400 | 4 payments
|
| Olympus America | Thunderbeat | $196 | 3 payments
|
| Davol | Phasix | $128 | 1 payment
|
| Integra LifeSciences | Codman Certas | $118 | 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
- 1235591595
- Licence
- CA SPI685, OH 35.134539
- Group
- Stanford Health Care
- Gender
- Male
More record details
- Sole proprietor
- No
- Taxonomy
- Federal specialty code 204F00000X (204F00000X); Surgery (208600000X)
- Mailing address
- 300 Pasteur Dr, Stanford, CA, 94305
- NPI first listed
- 2016-03-25
- NPI last updated
- 2026-09-02
- NPI record certified
- 2026-09-02
This is when the NPI record was last certified, not a medical board exam.