1. Home
  2. Directory
  3. New Jersey
  4. Morristown
  5. Pediatrics
  6. NPI Profile

DR. JOHN JOSEPH GREGORY JR. M.D.
NPI 1457307340
Pediatrics - Pediatric Hematology-Oncology in Morristown, NJ

Active since May 25, 2006
100 MADISON AVE, BOX 70, MORRISTOWN, NJ 07960(973) 971-6720(973) 401-2410 Get Directions Write a Review

NPPES record last updated: March 25, 2008. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. John Joseph Gregory Jr. M.d. NPPES

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

DR. JOHN JOSEPH GREGORY JR. M.D. (NPI 1457307340) is an individual pediatric hematology-oncology provider in Morristown, New Jersey, licensed in New Jersey (25MA06944600) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1457307340
Entity TypeIndividualMale
Primary Taxonomy2080P0207X
Provider Legal NameDR. JOHN JOSEPH GREGORY JR.Credential: M.D.
Location Address100 MADISON AVE, BOX 70Morristown, NJ 07960-6136
Mailing Address100 Madison Ave, Box 70Morristown, NJ 07960-6136 · (973) 971-6720 · Fax (973) 401-2410
Phone(973) 971-6720
Fax(973) 401-2410
Sole ProprietorNo
Enumeration DateMay 25, 2006
Last NPPES UpdateMarch 25, 2008
✔ NPI 1457307340 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in NJ · 25MA06944600
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
100 MADISON AVE, Morristown, NJ 07960
Open in Google Maps ↗

Other Identifiers 3

Medicare ID-Type Unspecified044316DHK
Medicare UPIND96386
Medicaid02257165NY

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.

MELISSA LOPES M.D
Anesthesiology
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (201) 943-5831
MORRISTOWN MEMORIAL HOSPITAL
General Acute Care Hospital
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (888) 250-9947
VINCENT MAIXNER LCSW
Social Worker (Clinical)
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (973) 971-5000
MEGAN LYNN CATHEY NP-C
Nurse Practitioner (Adult Health)
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (973) 971-5358
ANTHONY RIZZUTI
Nurse Anesthetist, Certified Registered
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (800) 991-9133
OMAR MOHAMMED ABDELFATTAH MBBCH
Student in an Organized Health Care Education/Training Program
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (973) 971-5000
ALEXANDER CASCAIS MD
Student in an Organized Health Care Education/Training Program
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (973) 971-5000
DEVEA RANI DE MD
Student in an Organized Health Care Education/Training Program
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (973) 971-5000

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 John Gregory's NPI number?

The NPI number for John Gregory is 1457307340. It was assigned to this individual provider in the NPPES registry on May 25, 2006.

Where is John Gregory located?

John Gregory practices at 100 Madison Ave Box 70, Morristown, NJ 07960. The listed phone number is (973) 971-6720.

What is John Gregory's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.

When was this NPI record last updated?

The NPPES record for John Gregory was last updated on March 25, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.