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

Dr. Stephen Mark Massa, MD

Individual provider Neurology Physician · NPI 1710938584

Dr. Stephen Mark Massa, MD is a Neurology Physician in San Francisco, California. Licensed in California. Registered with an NPI since 2006.

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

4150 Clement St Neurology (127)
San Francisco, CA 94121-1545
Phone: (415) 221-4810
Fax: (415) 750-2273
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurology Physician (primary) Taxonomy 2084N0400X · Licence G57165 (CA)

Record details

NPI number1710938584
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 15, 2006
Last updated in NPPESJuly 12, 2007

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