DR. WILLIAM THOMAS BARKER PSYD
NPI 1891122636
Psychologist - Clinical in Apo, AP

Q: What is William Barker's NPI number?

The NPI number for William Barker is 1891122636. It was assigned to this individual provider in the NPPES registry on October 10, 2013.

Q: What is William Barker's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Q: When was this NPI record last updated?

The NPPES record for William Barker was last updated on July 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.

Active since October 10, 2013

OPC 371 BOX 39, APO, AP 96271(315) 737-4817 Get Directions Write a Review

NPPES record last updated: July 7, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Dr. William Thomas Barker Psyd NPPES

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

DR. WILLIAM THOMAS BARKER PSYD (NPI 1891122636) is an individual clinical provider in Apo, AP, licensed in Illinois (071008688) and active in the NPI registry since October 2013.

NPPES Registry Identity

NPI1891122636

Entity TypeIndividualMale

Primary Taxonomy103TC0700X

Provider Legal NameDR. WILLIAM THOMAS BARKERCredential: PSYD

Location AddressOPC 371 BOX 39Apo, AP 96271-9001

Mailing AddressOpc 371 Box 39Apo, AP 96271-9001 · (315) 737-4817

Phone(315) 737-4817

Sole ProprietorNo

Enumeration DateOctober 10, 2013

Last NPPES UpdateJuly 7, 2025

NPPES CertifiedJune 23, 2025

✔ NPI 1891122636 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

License✔ Licensed in IL · 071008688

Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. BRANDON BURT DSC, PA-C

Physician Assistant (Surgical)

OPC 371 BOX 39
APO, AP 96271

(315) 737-1265

MICHELE A ANSORGE PA

Physician Assistant (Medical)

OPC 371 BOX 39
APO, AP 96271

(315) 737-1117

SARAH YOON OTR

Occupational Therapist

OPC 371 BOX 39
APO, AP 96271

(315) 737-1411

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 William Barker's NPI number?

The NPI number for William Barker is 1891122636. It was assigned to this individual provider in the NPPES registry on October 10, 2013.

Where is William Barker located?

William Barker practices at Opc 371 Box 39, Apo, AP 96271. The listed phone number is (315) 737-4817.

What is William Barker's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

When was this NPI record last updated?

The NPPES record for William Barker was last updated on July 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.