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

Dr. Mark Williams, MD

Individual provider Psychiatry Physician · NPI 1306919584

Dr. Mark Williams, MD is a Psychiatry Physician in Pomona, 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.

See every abbreviation used in this directory →

Practice location Address checks out

2008 N Garey Ave
Pomona, CA 91767-2722
Phone: (909) 623-6131
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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 A74958 (CA)

Record details

NPI number1306919584
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 16, 2006
Last updated in NPPESJanuary 30, 2008
Mailing address280 S Euclid Ave Apt 125, Pasadena, CA 91101-2788

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