Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Erin O'Brien, PSY.D.

Q: What is the NPI number for Erin O'Brien?

The National Provider Identifier (NPI) for Erin O'Brien is 1336384999, a Type 1 (individual) record in the CMS NPPES registry.

Psychologist in West Haven, CT · enumerated 2008.

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

National Provider Identifier

1336384999

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Erin O'Brien

Credential PSY.D.

Sex Female

Practice address 950 Campbell Ave, Va-Ct Healthcare System, West Haven, CT, 06516

Phone (203) 932-5711

Enumeration date Dec 11, 2008

Last updated in NPPES Dec 11, 2008

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 002574 (CT) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD 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 Erin O'Brien practice?

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

What is the NPI number for Erin O'Brien?

The National Provider Identifier (NPI) for Erin O'Brien is 1336384999, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-12-11.