Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory M Riedlinger, MD, PHD

Anatomic Pathology & Clinical Pathology Physician in New Brunswick, NJ · enumerated 2013.

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

National Provider Identifier

1639516891

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Registry record

Entity type Individual (Type 1)

Name Gregory M Riedlinger

Credential MD, PHD

Sex Male

Practice address Rutgers Cancer Institute of New Jersey, 195 Little Albany Parkway, Room 3553, New Brunswick, NJ, 08903

Phone (732) 235-8978

Enumeration date May 29, 2013

Last updated in NPPES Oct 30, 2024

Taxonomy & licenses

207ZP0007X Molecular Genetic Pathology (Pathology) Physician Allopathic & Osteopathic Physicians · License 25MA09738600 (NJ) Secondary

207ZP0101X Anatomic Pathology Physician Allopathic & Osteopathic Physicians · License 25MA09738600 (NJ) Secondary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License L-255276 (MA) Secondary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 25MA09738600 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Gregory Riedlinger practice?

The practice location on file with NPPES is in New Brunswick, NJ. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Gregory Riedlinger?

The National Provider Identifier (NPI) for Gregory Riedlinger is 1639516891, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-30.