Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gerald T O'Brien, PH.D.

Clinical Psychologist in Bala Cynwyd, PA · enumerated 2006.

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

National Provider Identifier

1164439808

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Registry record

Entity type Individual (Type 1)

Name Gerald T O'Brien

Credential PH.D.

Sex Male

Practice address 112 Bala Ave, Bala Cynwyd, PA, 19004

Phone (610) 667-6490

Fax (610) 667-1744

Enumeration date Aug 2, 2006

Last updated in NPPES Dec 4, 2009

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PS004240L (PA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
OB022399	Other	PA	BLUESHIELD
097182000	Other	PA	MAGELLAN BEHAVIORAL HEALT

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.

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Frequently asked questions

How do I verify Gerald O'Brien's NPI record?

Cross-check NPI 1164439808 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1164439808 active?

Yes, as of the latest NPPES snapshot, NPI 1164439808 is active (record last updated 2009-12-04).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-12-04.