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

Dr. William Francis Owen Jr., MD

Individual provider Internal Medicine Physician · NPI 1154323483

Dr. William Francis Owen Jr., MD is an Internal Medicine Physician in San Francisco, California. Licensed in California. Registered with an NPI since 2005.

Licensed in
CA
In the registry since
2005
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

45 Castro St Ste 402
San Francisco, CA 94114-1027
Phone: (415) 861-2400
Fax: (415) 861-8733
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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 G31385 (CA)

Record details

NPI number1154323483
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 31, 2005
Last updated in NPPESJuly 13, 2026

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