Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Paul Mortimer, M.D.

Family Medicine Physician in Aliquippa, PA · enumerated 2012.

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

National Provider Identifier

1851643522

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Paul Mortimer

Credential M.D.

Sex Male

Practice address 139 Clearview Rd, Aliquippa, PA, 15001

Phone (724) 378-4984

Enumeration date Oct 5, 2012

Last updated in NPPES Oct 5, 2012

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License MD036645E (PA) 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

What is the NPI number for Gregory Mortimer?

The National Provider Identifier (NPI) for Gregory Mortimer is 1851643522, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Mortimer practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-10-05.