Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Tammy T Chang, MD, PHD

Individual provider Surgery Physician · NPI 1972787174

Dr. Tammy T Chang, MD, PHD is a General Surgery in San Francisco, California. Graduated from Harvard Medical School in 2003, 23 years ago. Practices with UCSF Dept of Surgery, a 211-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
23
Trained at
Harvard Medical School
Licensed in
CA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

513 Parnassus Ave S321
San Francisco, CA 94143-0470
Phone: (415) 476-1239
Fax: (415) 502-1259
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence A90279 (CA)

Record details

NPI number1972787174
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedDecember 24, 2007
Last updated in NPPESDecember 24, 2007

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGENERAL SURGERY
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 2003 (23 years in practice)
Group practice Ucsf Dept Of Surgery — 211 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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