Quick answers
- Which hospitals does Tammy T. Chang work at?
- Medicare's official clinician data lists Tammy T. Chang at 1 hospital: UCSF Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Tammy T. Chang see patients?
- Medicare's clinician data lists 1 practice location in San Francisco, CA. Call before your visit to confirm the address.
- What is Tammy T. Chang's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does Tammy T. Chang accept Medicare assignment?
- Yes. Medicare's clinician data says Tammy T. Chang 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 Tammy T. Chang?
- (415) 476-1000, as listed in official Medicare / NPI Registry data.
- What is Tammy T. Chang's NPI number?
- 1972787174. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Tammy T. Chang works
Medicare's Facility Affiliation Data lists Tammy T. Chang at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · CCN 050454
Practice locations
Addresses where Tammy T. Chang is enrolled with Medicare (CMS data updated 2026-10-02).
- 505 Parnassus AveSan Francisco, CA 94143 (415) 476‑1000
Group practices
Medicare enrollment lists Tammy T. Chang as a member of this group (CMS data updated 2026-10-02).
- UCSF Dept of Surgery215 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 2003 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972787174 |
| 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