Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Ralph Christian Fenn, MD, PHD

Individual provider Psychiatry Physician · NPI 1659564201

Dr. Ralph Christian Fenn, MD, PHD is a Psychiatry Physician in San Francisco, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

1131 Irving St
San Francisco, CA 94122-2108
Phone: (415) 379-0094
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence A79192 (CA)

Record details

NPI number1659564201
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorYes
NPI enumeratedAugust 27, 2007
Last updated in NPPESMarch 7, 2013

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