Tammy T. Chang, M.D., PH.D.
NPI 1972787174ActiveIndividual· Surgery· San Francisco, CA
Surgery (M.D., PH.D.) in San Francisco, California, trained at Harvard Medical School (class of 2003). Medicare paid $14,996 for services to 32 patients in 2024.
Overview
| NPI | 1972787174 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., PH.D. |
| Sole proprietor | No |
| NPI issued | Dec 24, 2007 |
| Last updated in NPPES | Dec 24, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | A90279 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - General Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 32 |
|---|---|
| Services billed | 93 across 12 procedure codes |
| Paid by Medicare | $14,996 |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | General Surgery |
Medical group
- UCSF Dept of SurgerySan Francisco, CA · 215 clinicians
Hospital affiliation
- UCSF Medical CenterSan Francisco, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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