What is William Irwin's NPI number?

William Irwin's National Provider Identifier (NPI) is 1588288146, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Irwin's specialty?

William Irwin is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).

Where is William Irwin located?

William Irwin's practice location on file with NPPES is 1131 E International Airport Rd, Anchorage, AK 99518-1416.

What is William Irwin's phone number?

The practice phone number listed in the NPPES registry for William Irwin is (907) 276-2700.

Is William Irwin's NPI active?

Yes — William Irwin's NPI (1588288146) is active in the NPPES registry as of the last update on 2025-08-05.

IndividualActive

William Irwin

NPI 1588288146 · Psychologist · Anchorage, AK

William Irwin is a Psychologist provider in Anchorage, AK (NPI 1588288146).

Provider details

NPI number: 1588288146
Entity type: Individual
Primary specialty: PsychologistBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: No

Specialties & taxonomies

PsychologistPrimary103T00000X
Behavioral Health & Social Service Providers

Profile Score

Established profile(58/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
6 yrs in NPPES registry
Profile completeness38% of score
83% 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

1131 E International Airport Rd

Anchorage, AK 99518-1416

Phone: (907) 276-2700

Street-level locationGet directions

More AK providers

Mailing address