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

Individual provider Internal Medicine Physician · NPI 1659455251

Diana Lam, MD is registered under Cardiovascular Disease (Cardiology) in San Francisco, California. Graduated from University of California, San Diego School of Medicine in 1980, 46 years ago. Accepts Medicare assignment. Licensed in California.

Years since qualifying
46
Trained at
University of California, San Diego School of Medicine
Licensed in
CA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1199 Bush St #560
San Francisco, CA 94109 Not confirmed with CMS for 16 years — call before visiting
Phone: (415) 664-9183
Fax: (415) 929-8138
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence G45411 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence G45411 (CA)

Record details

NPI number1659455251
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 24, 2006
Last updated in NPPESFebruary 9, 2010

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, SAN DIEGO SCHOOL OF MEDICINE
Graduated 1980 (46 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients95
Services billed 244 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Ucsf Health Saint Francis Hospital Hospital · San Francisco, CA

Other providers in San Francisco