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WARREN KEITH WILLIAMSON P.A.
NPI 1912951823
Physician Assistant in Phoenix, AZ

Active since May 22, 2006
220 SOUTH 12TH AVENUE, MARICOPA COUNTY HEALTH CARE FOR THE HOMELESS, PHOENIX, AZ 85007(602) 372-2117(602) 372-2120 Get Directions Write a Review

NPPES record last updated: January 12, 2012. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Warren Keith Williamson P.a. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WARREN KEITH WILLIAMSON P.A. (NPI 1912951823) is an individual physician assistant in Phoenix, Arizona, licensed in Arizona (2892) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1912951823
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameWARREN KEITH WILLIAMSONCredential: P.A.
Location Address220 SOUTH 12TH AVENUE, MARICOPA COUNTY HEALTH CARE FOR THE HOMELESSPhoenix, AZ 85007-3101
Mailing Address220 South 12th Avenue, Maricopa County Health Care For The HomelessPhoenix, AZ 85007-3101 · (602) 372-2117 · Fax (602) 372-2120
Phone(602) 372-2117
Fax(602) 372-2120
Sole ProprietorNo
Enumeration DateMay 22, 2006
Last NPPES UpdateJanuary 12, 2012
✔ NPI 1912951823 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in AZ · 2892
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
220 SOUTH 12TH AVENUE, Phoenix, AZ 85007
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Other Identifiers 1

Medicaid943896AZ

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Warren Williamson's NPI number?

The NPI number for Warren Williamson is 1912951823. It was assigned to this individual provider in the NPPES registry on May 22, 2006.

Where is Warren Williamson located?

Warren Williamson practices at 220 South 12th Avenue Maricopa County Health Care For The Homeless, Phoenix, AZ 85007. The listed phone number is (602) 372-2117.

What is Warren Williamson's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

When was this NPI record last updated?

The NPPES record for Warren Williamson was last updated on January 12, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.