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

Dr. Mary Youssef, M.D.

Psychiatry Physician in Ridgewood, NJ · enumerated 2017 · practices at Mary Youssef MD.

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

National Provider Identifier

1316471329

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Registry record

Entity type Individual (Type 1)
Name Dr. Mary Youssef
Credential M.D.
Sex Female
Practice address Ridgewood, NJ, 07450
Phone (201) 857-0988
Fax (201) 857-0989
Enumeration date Apr 17, 2017
Last updated in NPPES Feb 9, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 310486 (NY) Secondary
2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 25MA11457800 (NJ) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 Mary Youssef?
Mary Youssef is registered in NPPES with the primary taxonomy of Psychiatry Physician. 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 2023-02-09.