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

Marla Onishi, MD

Individual provider Family Medicine Physician · NPI 1528071883

Marla Onishi, MD is an Internal Medicine in Cambridge, Massachusetts. Graduated from Js Weill Medical College, Cornell University in 1982, 44 years ago. Practices with President and Fellows of Harvard College, a 95-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
44
Trained at
Js Weill Medical College, Cornell University
Licensed in
MA
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

75 Mount Auburn St Harvard University Health Services
Cambridge, MA 02138-4960
Phone: (617) 495-2001
Fax: (617) 496-0530
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 250144 (MA)

Record details

NPI number1528071883
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 15, 2006
Last updated in NPPESJanuary 14, 2015
Mailing address75 Mount Auburn St, Cambridge, MA 02138-4960

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolJS WEILL MEDICAL COLLEGE, CORNELL UNIVERSITY
Graduated 1982 (44 years in practice)
Group practice President And Fellows Of Harvard College — 95 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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