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

Robert Gross Spencer, MD

Individual provider Emergency Medicine Physician · NPI 1477758993

Robert Gross Spencer, MD is an Emergency Medicine Physician in San Mateo, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
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

222 W 39th Ave
San Mateo, CA 94403-4364
Phone: (650) 573-2671
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence G20456 (CA)

Record details

NPI number1477758993
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 15, 2007
Last updated in NPPESMarch 6, 2008
Mailing address2100 Powell St, Suite 900, Emeryville, CA 94608-1826

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