Registry data as of Aug 27, 2026

Robert Williamson, M.D.

Psychiatry Physician · Phoenix, AZ

Robert Williamson, M.D. is a psychiatry physician with a practice address in Phoenix, Arizona, and NPI 1316950298, issued on Aug 14, 2006. Check the license (Arizona 37934, as entered in NPPES) on the Arizona Medical Board; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, loaded Aug 27, 2026 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1316950298
Name
Robert Williamson
Credential
M.D.
Primary taxonomy
Psychiatry Physician 2084P0800X
License numbers
37934 AZ
K5430 TX
Self-reported in NPPES; status is on the state search
Practice location
903 N 2ND St, Phoenix, AZ 85004
Phone
(602) 416-7600
Enumerated
Aug 14, 2006
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 903 N 2ND St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Erich Brueschke, PAPhysician Assistant1265740880
  2. Paige Hamilton, PAPhysician Assistant1245447820
  3. Amanda Johnson-Wo, PAPhysician Assistant1992100887
  4. Tracy Poston, PACPhysician Assistant1588657662
  5. Lisa Sims, RNPRegistered Nurse1922184332

Verify Robert Williamson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersArizona Medical Board
    Search for license 37934    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Open the Arizona license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Psychiatry Physician providers in Arizona

There are 929 psychiatry physician records in Arizona. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 929 in Arizona → Every provider in Phoenix →

Other psychiatry physician records in Arizona

  1. Osama Abulseoud, MDScottsdale, AZ1679654800
  2. Mary AckerleyTucson, AZ1801048012
  3. Nazila Adib, MDScottsdale, AZ1740202613
  4. Adrienne Adler-Neal, MD, PHDScottsdale, AZ1558990127
  5. Jose Agosto, M.D.Mesa, AZ1346323110
  6. Fayyaz Ahmad, M.D.Tempe, AZ1295741791
  7. Mehmud Ahmed, MDPhoenix, AZ1942221635
  8. Nicholas Ahrendt, M.D.Tucson, AZ1043744998
  9. Stephen AielloPrescott, AZ1740852532
  10. Samantha AkersTucson, AZ1609700061

Common questions

What is Robert Williamson, M.D.'s NPI number?

Robert Williamson, M.D.'s National Provider Identifier (NPI) is 1316950298, issued on Aug 14, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Robert Williamson, M.D. located?

The NPPES record lists a practice address at 903 N 2ND St, Phoenix, AZ, 85004. Phone: (602) 416-7600. Providers update this record themselves, so call before visiting.

How can I verify Robert Williamson, M.D.'s license?

NPPES lists Arizona license number 37934, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.