Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory Alan Fortier, MD

Radiation Oncology Physician in York, PA · enumerated 2005.

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

National Provider Identifier

1619964194

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Gregory Alan Fortier

Credential MD

Sex Male

Practice address 25 Monument Rd, Suite 94, York, PA, 17403

Phone (717) 741-8180

Fax (717) 741-8196

Enumeration date Sep 30, 2005

Last updated in NPPES Sep 15, 2020

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License MD038076E (PA) Primary

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
1521067	Other	PA	GATEWAY WMG
4275150	Other	PA	AETNA
50074886	Other	PA	CAPITAL BLUE CROSS-WMG
919374	Other	MD	CAREFIRST MD BCBS
031981	Other	PA	JOHNS HOPKINS
001085414	Medicaid	PA	-
135874	Other	PA	HIGHMARK BLUE SHIELD
20069234	Other	PA	AMERIHEALTH MERCY-WMG
237305	Other	PA	UNISON-WMG

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 specialty is Gregory Fortier?

Gregory Fortier is registered in NPPES with the primary taxonomy of Radiation Oncology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Benson Harvey Surgery Physician · York, PA NPI 1215939434 Kern Hughes Surgery Physician · York, PA NPI 1235134628 Thomas Dipasquale Orthopaedic Trauma Physician · York, PA NPI 1770588477 Edward Garber Surgery Physician · York, PA NPI 1346245958 Apple Hill Surgical Center Partners Ambulatory Surgical Clinic/Center · York, PA NPI 1801892724 Annie Kannarkatt Hematology & Oncology Physician · York, PA NPI 1750380036 Clement Ho Specialist · York, PA NPI 1871592105 Stacey Weiland Gastroenterology Physician · York, PA NPI 1649279746

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-09-15.