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

Dr. Deborah Harris O'Brien, PH.D.

Cognitive & Behavioral Psychologist in Laurel, MD · enumerated 2007.

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

National Provider Identifier

1083738165

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Registry record

Entity type Individual (Type 1)

Name Dr. Deborah Harris O'Brien

Credential PH.D.

Sex Female

Practice address Laurel, MD, 20723

Phone (301) 498-7452

Enumeration date Mar 16, 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

103T00000X Psychologist Behavioral Health & Social Service Providers · License 02677 (MD) Secondary

103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License 02677 (MD) Primary

103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License 02677 (MD) Secondary

103TM1800X Intellectual & Developmental Disabilities Psychologist Behavioral Health & Social Service Providers · License 02677 (MD) Secondary

103TP2701X Group Psychotherapy Psychologist Behavioral Health & Social Service Providers · License 02677 (MD) 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

Where does Deborah O'Brien practice?

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

What is the NPI number for Deborah O'Brien?

The National Provider Identifier (NPI) for Deborah O'Brien is 1083738165, a Type 1 (individual) record in the CMS NPPES registry.

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