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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. GREGORY O. DEJEAN DDS (PEDIATRIC DENT)
NPI 1699753467
Dentist - Pediatric Dentistry in Nyc, NY

Active since January 03, 2006
345 E 24TH ST, ATTN: PEDIATRIC DENTISTRY DEPT., NYC, NY 10010(212) 998-9657(212) 995-4242 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Gregory O. Dejean Dds (pediatric Dent) NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GREGORY O. DEJEAN DDS (PEDIATRIC DENT) (NPI 1699753467) is an individual pediatric dentistry provider in Nyc, New York, licensed in New York (045705-1) and active in the NPI registry since January 2006.

NPPES Registry Identity

NPI1699753467
Entity TypeIndividualMale
Primary Taxonomy1223P0221X
Provider Legal NameDR. GREGORY O. DEJEANCredential: DDS (PEDIATRIC DENT)
Location Address345 E 24TH ST, ATTN: PEDIATRIC DENTISTRY DEPT.Nyc, NY 10010-4020
Mailing Address161 E 90th St, # 3aNyc, NY 10128-2342 · (212) 996-2550
Phone(212) 998-9657
Fax(212) 995-4242
Sole ProprietorNo
Enumeration DateJanuary 3, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1699753467 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · Pediatric DentistryDental Providers
Taxonomy Code1223P0221X
License✔ Licensed in NY · 045705-1
Definition
An age-defined specialty that provides both primary and comprehensive preventive and therapeutic oral health care for infants and children through adolescence, including those with special health care needs.
345 E 24TH ST, Nyc, NY 10010
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KEITH CASSAR
Dentist (General Practice)
345 E 24TH ST
NEW YORK, NY 10010
New York County (212) 998-9800
STEPHEN TIMMY CHAN
Student in an Organized Health Care Education/Training Program
345 E 24TH ST
NEW YORK, NY 10010
New York County (212) 998-9800
RAMTIN VAFAMANSOURI
Dentist
345 E 24TH ST
NEW YORK, NY 10010
New York County (212) 998-9800
LEENA MAHMOODA MANZOOR
Student in an Organized Health Care Education/Training Program
345 E 24TH ST
NEW YORK, NY 10010
New York County (212) 998-9800
DR. AKHIL SAINI DDS
Dentist
345 E 24TH ST
NEW YORK, NY 10010
New York County (212) 998-9800
JONGWOOK CHA
Student in an Organized Health Care Education/Training Program
345 E 24TH ST
NEW YORK, NY 10010
New York County (212) 998-9800
MARK DINH
Student in an Organized Health Care Education/Training Program
345 E 24TH ST
NEW YORK, NY 10010
New York County (212) 998-9800
YOONCHANG KIM
Student in an Organized Health Care Education/Training Program
345 E 24TH ST
NEW YORK, NY 10010
New York County (212) 998-9800

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregory Dejean's NPI number?

The NPI number for Gregory Dejean is 1699753467. It was assigned to this individual provider in the NPPES registry on January 3, 2006.

Where is Gregory Dejean located?

Gregory Dejean practices at 345 E 24th St Attn: Pediatric Dentistry Dept., Nyc, NY 10010. The listed phone number is (212) 998-9657.

What is Gregory Dejean's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Pediatric Dentistry, with taxonomy code 1223P0221X.

When was this NPI record last updated?

The NPPES record for Gregory Dejean was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.