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

Dr. Robert G Williamson, MD

Individual provider Psychiatry Physician · NPI 1316950298

Dr. Robert G Williamson, MD is a Psychiatry Physician in Phoenix, Arizona. Practices as a sole proprietor. Licensed in Arizona and Texas.

Licensed in
AZ, TX
In the registry since
2006
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

903 N 2nd St
Phoenix, AZ 85004-1906
Phone: (602) 416-7600
Fax: (602) 416-7703
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Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 37934 (AZ)
Psychiatry Physician Taxonomy 2084P0800X · Licence K5430 (TX)

Record details

NPI number1316950298
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 14, 2006
Last updated in NPPESJune 8, 2011
Mailing address903 N 2nd St, Phoenix, AZ 85004-1906

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