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

Dr. Martin Myron Mass, MD

Individual provider Internal Medicine Physician · NPI 1922013382

Dr. Martin Myron Mass, MD is an Internal Medicine Physician in San Francisco, California. Licensed in California. Registered with an NPI since 2006.

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

580 Valencia St
San Francisco, CA 94110-1115
Phone: (415) 593-1136
Fax: (415) 291-0489
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G47043 (CA)
Infectious Disease Physician Taxonomy 207RI0200X · Licence G47043 (CA)

Record details

NPI number1922013382
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 31, 2006
Last updated in NPPESJuly 1, 2016

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