Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alex Holdaway, PHD

Clinical Child & Adolescent Psychologist in Philadelphia, PA · enumerated 2021.

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

National Provider Identifier

1710657069

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Registry record

Entity type Individual (Type 1)

Name Dr. Alex Holdaway

Credential PHD

Sex Male

Practice address 3401 Civic Center Blvd, Philadelphia, PA, 19104

Phone (267) 425-9675

Enumeration date Sep 17, 2021

Last updated in NPPES Jan 7, 2026

Taxonomy & licenses

103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License 0810008966 (VA) Secondary

103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License PS019029 (PA) Primary

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

Where does Alex Holdaway practice?

The practice location on file with NPPES is in Philadelphia, PA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Alex Holdaway?

The National Provider Identifier (NPI) for Alex Holdaway is 1710657069, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-07.