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

Arthur Thomas Mackay

Optometrist in Newton, MA · enumerated 2019.

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

National Provider Identifier

1174089957

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Registry record

Entity type Individual (Type 1)

Name Arthur Thomas Mackay

Sex Male

Practice address Newton, MA, 02459

Phone (617) 584-0209

Enumeration date Feb 16, 2019

Last updated in NPPES Feb 16, 2019

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 2737 (MA) Primary

Other identifiers

Identifier	Type	State	Issuer
2737	Other	MA	LICENSE NUMBER

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 Arthur Mackay practice?

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

What is the NPI number for Arthur Mackay?

The National Provider Identifier (NPI) for Arthur Mackay is 1174089957, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-02-16.