Won-Tak Choi, M.D., PH.D.
NPI 1275860918 · Anatomic Pathology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Won-Tak Choi, M.D., PH.D. is a Anatomic Pathology Physician provider in San Francisco, CA (NPI 1275860918).
Provider details
- NPI number
- 1275860918
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A132954 (CA)
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 tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,672 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 902 | $42 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 342 | $31 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 162 | $39 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 83 | $91 |
| Special Stained Specimen Slides to Examine Tissue Including Interpretation and Report88313 | 55 | $13 |
| Pathology Examination of Tissue Using a Microscope, Moderately Low Complexity88304 | 49 | $13 |
Practice location
Mailing address
Additional practice locations (1)
- 1001 Potrero Ave # 6dSfgh Ob GynSan Francisco, CA 94110-3518Phone: (909) 544-1955
Registry dates
- Enumerated
- 2009-11-16
- Last updated
- 2024-10-22
- Certified
- 2024-10-22
Frequently asked questions
- What is Won-Tak Choi's NPI number?
- Won-Tak Choi's National Provider Identifier (NPI) is 1275860918, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Won-Tak Choi's specialty?
- Won-Tak Choi is listed in the NPPES registry with a primary specialty of Anatomic Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Won-Tak Choi located?
- Won-Tak Choi's practice location on file with NPPES is 505 Parnassus Ave # M552, San Francisco, CA 94143-2204.
- What is Won-Tak Choi's phone number?
- The practice phone number listed in the NPPES registry for Won-Tak Choi is (415) 353-9533.
- Does Won-Tak Choi accept Medicare?
- Won-Tak Choi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Won-Tak Choi's NPI active?
- Yes — Won-Tak Choi's NPI (1275860918) is active in the NPPES registry as of the last update on 2024-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.