Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alexander Martin, OD

Optometrist in Brookline, MA · enumerated 2017.

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

National Provider Identifier

1851816201

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Alexander Martin

Credential OD

Sex Male

Practice address 24 Webster Pl, Brookline, MA, 02445

Phone (617) 202-2020

Fax (617) 734-3264

Enumeration date Aug 7, 2017

Last updated in NPPES Jul 23, 2025

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 0979 (NH) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 5272 (MA) 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
5272	Other	MA	TPA OPTOMETRIST

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

Where does Alexander Martin practice?

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

What is the NPI number for Alexander Martin?

The National Provider Identifier (NPI) for Alexander Martin is 1851816201, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-23.