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

Dr. John Maa, MD

Individual provider Surgery Physician · NPI 1356305866

Dr. John Maa, MD is a General Surgery in Greenbrae, California. Graduated from Harvard Medical School in 1994, 32 years ago. Practices with Chinese Hospital Association, a 36-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
32
Trained at
Harvard Medical School
Licensed in
CA
In the registry since
2006
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

250 Bon Air Rd
Greenbrae, CA 94904-1702
Phone: (415) 924-2515
Fax: (415) 924-2661
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 400 Parnassus Ave, San Francisco, CA 94143-2202 — (415) 353-2161

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence A55909 (CA)

Record details

NPI number1356305866
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 12, 2006
Last updated in NPPESMarch 17, 2018
Mailing address5 Bon Air Road #101, Larkspur, CA 94909

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 1994 (32 years in practice)
Group practice Chinese Hospital Association — 36 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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