Warren Williamson, P.A.
NPI 1912951823 · Physician Assistant · Phoenix, AZ
Warren Williamson, P.A. is a Physician Assistant provider in Phoenix, AZ (NPI 1912951823).
Provider details
- NPI number
- 1912951823
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.
- Sex
- Male
- Sole proprietor
- No
- License
- 2892 (AZ)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-22
- Last updated
- 2012-01-12
Frequently asked questions
- What is Warren Williamson's NPI number?
- Warren Williamson's National Provider Identifier (NPI) is 1912951823, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Warren Williamson's specialty?
- Warren Williamson is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Warren Williamson located?
- Warren Williamson's practice location on file with NPPES is 220 South 12th Avenue, Phoenix, AZ 85007-3101.
- What is Warren Williamson's phone number?
- The practice phone number listed in the NPPES registry for Warren Williamson is (602) 372-2117.
- Is Warren Williamson's NPI active?
- Yes — Warren Williamson's NPI (1912951823) is active in the NPPES registry as of the last update on 2012-01-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.