Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Ayer

Optometrist in Chelmsford, MA · enumerated 2006.

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

National Provider Identifier

1770649584

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Registry record

Entity type Individual (Type 1)

Name Michael Ayer

Sex Male

Practice address 228 Billerica Rd, Chelmsford, MA, 01824

Phone (978) 250-6170

Fax (978) 250-6170

Enumeration date Dec 28, 2006

Last updated in NPPES Nov 17, 2020

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 3485 (MA) Primary

Other identifiers

Identifier	Type	State	Issuer
0014544	Other	MA	NHP
8337514-002	Other	MA	CIGNA
W15782	Other	MA	BCBS
0313742	Medicaid	MA	-
792481	Other	MA	TUFTS

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 specialty is Michael Ayer?

Michael Ayer 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.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-17.