Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory D Northrop, MD

Sports Medicine (Orthopaedic Surgery) Physician in Pasadena, CA · enumerated 2005.

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

National Provider Identifier

1962404582

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Registry record

Entity type Individual (Type 1)

Name Gregory D Northrop

Credential MD

Sex Male

Practice address 2627 E Washington Blvd, Pasadena, CA, 91107

Phone (626) 797-2002

Fax (626) 798-0567

Enumeration date Aug 12, 2005

Last updated in NPPES Jul 10, 2024

Taxonomy & licenses

207XX0005X Sports Medicine (Orthopaedic Surgery) Physician Allopathic & Osteopathic Physicians · License A69737 (CA) Primary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License A69737 (CA) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00A697370	Medicaid	CA	-

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

What is the NPI number for Gregory Northrop?

The National Provider Identifier (NPI) for Gregory Northrop is 1962404582, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Northrop practice?

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

Other providers at this practice address

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Donald Norquist Orthopaedic Surgery Physician · Pasadena, CA NPI 1831191410 Daniel Laster Orthopaedic Surgery Physician · Pasadena, CA NPI 1457353062 Virginia Mabasa Physician Assistant · Pasadena, CA NPI 1922082924 Ben Pradhan Orthopaedic Surgery of the Spine Physician · Pasadena, CA NPI 1821042987 Risser Orthopaedic Group, A Medical Corporation Orthopaedic Surgery Physician · Pasadena, CA NPI 1659477487 Risser Orthopaedic Group, A Medical Corp. Durable Medical Equipment & Medical Supplies · Pasadena, CA NPI 1346420403 Amir Mostofi Orthopaedic Hand Surgery Physician · Pasadena, CA NPI 1518140268 Braden Criswell Orthopaedic Foot and Ankle Surgery Physician · Pasadena, CA NPI 1851568117

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