Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Gillian Blair, PH.D., LL.M.

Clinical Child & Adolescent Psychologist in Narberth, PA · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1538381157

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Registry record

Entity type Individual (Type 1)

Name Dr. Gillian Blair

Credential PH.D., LL.M.

Sex Female

Practice address Narberth, PA, 19072

Phone (484) 410-8359

Fax (610) 645-0904

Enumeration date May 3, 2007

Last updated in NPPES Sep 11, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PS008517L (PA) Secondary

103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License PS008517L (PA) Primary

103TF0200X Forensic Psychologist Behavioral Health & Social Service Providers · License PS008517L (PA) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1538381157 active?

Yes, as of the latest NPPES snapshot, NPI 1538381157 is active (record last updated 2025-09-11).

How do I verify Gillian Blair's NPI record?

Cross-check NPI 1538381157 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.