Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Susan Sun, MD

Individual provider Internal Medicine Physician · NPI 1871685578

Susan Sun, MD practises Internal Medicine in Greenbrae, California. Graduated from Harvard Medical School in 1990, 36 years ago. Practices with Galen Inpatient Physicians PC, a 1,031-clinician group and accepts Medicare assignment. Licensed in California and New Mexico.

Years since qualifying
36
Trained at
Harvard Medical School
Licensed in
CA, NM
In the registry since
2006
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address may be wrong

The ZIP code does not match the city and state on this record. Call before visiting.

250 Bon Air Rd
Greenbrae, CA 94984 Not confirmed with CMS for 11 years — call before visiting
Phone: (415) 925-7000

No coordinates on file. Search this address in Google Maps

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G72947 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 98399 (NM)
Hospitalist Physician Taxonomy 208M00000X · Licence 98399 (NM)
Hospitalist Physician Taxonomy 208M00000X · Licence G72947 (CA)

Record details

NPI number1871685578
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 29, 2006
Last updated in NPPESOctober 22, 2015

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 1990 (36 years in practice)
Group practice Galen Inpatient Physicians Pc — 1031 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients347
Services billed 1,020 a service is one billed item, such as a visit, a test or a procedure
Average patient age79

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.

  • Marinhealth Medical Center Hospital · Greenbrae, CA

Colleagues at Galen Inpatient Physicians PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1031 clinicians in the practice; 12 are shown here.

Other providers in Greenbrae