Quick answers
- Which hospitals does Won-Tak Choi work at?
- Medicare's official clinician data lists Won-Tak Choi at 3 hospitals: UCSF Health Saint Francis Hospital, UCSF Health St. Mary's Hospital and UCSF Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Won-Tak Choi see patients?
- Medicare's clinician data lists 3 practice locations, including San Francisco, CA. Call before your visit to confirm the address.
- What is Won-Tak Choi's specialty?
- Medicare lists Pathology as the primary specialty.
- Does Won-Tak Choi accept Medicare assignment?
- Yes. Medicare's clinician data says Won-Tak Choi accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Won-Tak Choi?
- (415) 476-4029, as listed in official Medicare / NPI Registry data.
- What is Won-Tak Choi's NPI number?
- 1275860918. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Won-Tak Choi works
Medicare's Facility Affiliation Data lists Won-Tak Choi at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- UCSF Health Saint Francis HospitalSan Francisco, CA · Acute Care Hospital · CCN 050152
- UCSF Health St. Mary's HospitalSan Francisco, CA · Acute Care Hospital · CCN 050457
- UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · CCN 050454
Practice locations
Addresses where Won-Tak Choi is enrolled with Medicare (CMS data updated 2026-10-02).
- 2330 Post StSan Francisco, CA 94115 (415) 476‑4029
- 450 Stanyan StSan Francisco, CA 94117 (415) 750‑5750
- 505 Parnassus AveSan Francisco, CA 94143 (415) 476‑1000
Group practices
Medicare enrollment lists Won-Tak Choi as a member of this group (CMS data updated 2026-10-02).
- University of California San Francisco1,839 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1275860918 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians