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

Dr. Grant N. Colfax, MD

Individual provider Internal Medicine Physician · NPI 1871610246

Dr. Grant N. Colfax, MD is an Internal Medicine Physician in San Francisco, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
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

995 Potrero Ave Bldg 90 Sfgh Internal Medicine
San Francisco, CA 94110-2859
Phone: (415) 206-8317
Fax: (415) 206-5586
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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 G81197 (CA)
Infectious Disease Physician Taxonomy 207RI0200X · Licence G81197 (CA)

Record details

NPI number1871610246
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 23, 2007
Last updated in NPPESJuly 20, 2010

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