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

Dr. Alan Joseph Mathieu, O.D.

Optometrist in Gorham, ME · enumerated 2006.

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

National Provider Identifier

1457367419

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Registry record

Entity type Individual (Type 1)

Name Dr. Alan Joseph Mathieu

Credential O.D.

Sex Male

Practice address Gorham, ME, 04038

Phone (207) 839-2638

Fax (207) 839-4204

Enumeration date Jul 31, 2006

Last updated in NPPES Oct 26, 2010

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 OPT724 (ME) Primary

152W00000X Optometrist Eye and Vision Services Providers · License OPT001081 (GA) Secondary

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
003725	Other	ME	BC/BS ANTHEN
1041364	Other	ME	AETNA
M851	Other	ME	CIGNA
116900000	Medicaid	ME	—
MT048	Other	ME	HARVARD PILGRIM HEALTH 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.

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Frequently asked questions

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.

What specialty is Alan Mathieu?

Alan Mathieu is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-10-26.