Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Justin W Hillman, PHD

Counseling Psychologist in Washington, DC · enumerated 2024 · practices at One Therapy Group Pllc.

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

National Provider Identifier

1942016621

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Registry record

Entity type Individual (Type 1)

Name Dr. Justin W Hillman

Credential PHD

Sex Male

Practice address 1350 Connecticut Ave Nw Ste 800, Washington, DC, 20036

Phone (202) 986-5941

Enumeration date Dec 6, 2024

Last updated in NPPES Dec 6, 2024

Taxonomy & licenses

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License PSY200001637 (DC) 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.

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Frequently asked questions

Where does Justin Hillman practice?

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

What is the NPI number for Justin Hillman?

The National Provider Identifier (NPI) for Justin Hillman is 1942016621, 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 2024-12-06.