Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory O. Dejean, DDS (PEDIATRIC DENT)

Pediatric Dentistry in Nyc, NY · enumerated 2006.

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

National Provider Identifier

1699753467

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory O. Dejean

Credential DDS (PEDIATRIC DENT)

Sex Male

Practice address 345 E 24th St, Attn: Pediatric Dentistry Dept., Nyc, NY, 10010

Phone (212) 998-9657

Fax (212) 995-4242

Enumeration date Jan 3, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223P0221X Pediatric Dentistry Dental Providers · License 045705-1 (NY) Primary

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 Gregory Dejean?

Gregory Dejean is registered in NPPES with the primary taxonomy of Pediatric Dentistry. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Billy Kyles General Practice Dentistry · New York, NY NPI 1205831633 Leslie-Faith Taub Adult Health Nurse Practitioner · New York, NY NPI 1649277112 George Raymond General Practice Dentistry · N.Y., NY NPI 1073503991 Kevin Heaney General Practice Dentistry · New York, NY NPI 1760449110 Donna Knowlton General Practice Dentistry · New York, NY NPI 1558396671 Cynthia Howes Nurse Practitioner · New York, NY NPI 1538180815 Yasmi Crystal Pediatric Dentistry · New York, NY NPI 1215957014 Siv Chhay General Practice Dentistry · New York, NY NPI 1013024538

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.