Kazunari Sasaki, M.D.
NPI 1235591595 · Surgery Physician · Stanford, CA
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kazunari Sasaki, M.D. is a Surgery Physician provider in Stanford, CA (NPI 1235591595).
Provider details
- NPI number
- 1235591595
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35.134539 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
145 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 105 | $55 |
| Transplantation of Donor Liver47135 | 15 | $4,363 |
| Preparation of Donor Liver for Transplantation47143 | 13 | $170 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 12 | $195 |
Typical Medicare-allowed amounts for these services range $55–$4,363 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 49 | 12 |
| Pantoprazole Sodium | 42 | 12 |
| Valganciclovir Hcl | 26 | 11 |
| Tacrolimus | 23 | — |
| Nystatin | 19 | — |
| Pen Needle, Diabeticbrand: Comfort Ez Pen Needle | 16 | — |
| Pen Needle, Diabeticbrand: Ultra-Fine Mini Pen Needle | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,644 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-03-25
- Last updated
- 2025-01-14
- Certified
- 2025-01-14
Frequently asked questions
- What is Kazunari Sasaki's NPI number?
- Kazunari Sasaki's National Provider Identifier (NPI) is 1235591595, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kazunari Sasaki's specialty?
- Kazunari Sasaki is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Kazunari Sasaki located?
- Kazunari Sasaki's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Kazunari Sasaki's phone number?
- The practice phone number listed in the NPPES registry for Kazunari Sasaki is (650) 723-4000.
- Does Kazunari Sasaki accept Medicare?
- Kazunari Sasaki is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kazunari Sasaki's NPI active?
- Yes — Kazunari Sasaki's NPI (1235591595) is active in the NPPES registry as of the last update on 2025-01-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.