Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ji-Young Yoon, PHD

Psychologist in Rockville, MD · enumerated 2021.

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

National Provider Identifier

1811563455

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Registry record

Entity type Individual (Type 1)

Name Dr. Ji-Young Yoon

Credential PHD

Sex Female

Practice address 2092 Gaither Rd Ste 100, Rockville, MD, 20850

Phone (301) 424-5200

Fax (301) 424-8063

Enumeration date Jun 3, 2021

Last updated in NPPES Dec 23, 2022

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers Secondary

221700000X Art Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 3383 (CT) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 33593 (CA) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 06984 (MD) 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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Ji-Young Yoon?

Ji-Young Yoon is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-23.