Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Gregory Michael Farrell, O.D.

Optometrist in Princeton, ME · enumerated 2006 · practices at St Croix Regional Family Health Center.

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

National Provider Identifier

1528141348

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Registry record

Entity type Individual (Type 1)

Name Gregory Michael Farrell

Credential O.D.

Sex Male

Practice address Princeton, ME, 04668

Phone (207) 796-5033

Fax (207) 796-5528

Enumeration date Oct 23, 2006

Last updated in NPPES Aug 27, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OPT739 (ME) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier	Type	State	Issuer
043000239001	Other	-	FEDERAL BLUE CROSS
1042751	Other	-	AETNA US HEALTHCARE
151320000	Medicaid	ME	-
029141	Other	-	ANTHEM BLUE CROSS
000582597002	Other	-	UNITED HEALTH CARE
410006235	Other	ME	PALMETTO GBA--RAILROAD
MNT287	Other	-	HARVARD PILGRIM HEALTH

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.

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Frequently asked questions

What is the NPI number for Gregory Farrell?

The National Provider Identifier (NPI) for Gregory Farrell is 1528141348, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Farrell practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-27.