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

Dr. Richard Bruce Mcmaster, OD

Optometrist in Lewistown, MT · enumerated 2005.

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

National Provider Identifier

1134103310

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Registry record

Entity type Individual (Type 1)

Name Dr. Richard Bruce Mcmaster

Credential OD

Sex Male

Practice address Lewistown, MT, 59457

Phone (406) 538-2020

Fax (406) 538-8988

Enumeration date Dec 1, 2005

Last updated in NPPES Jul 26, 2011

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 573OPT (MT) 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
0483756	Medicaid	MT	-

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

How do I verify Richard Mcmaster's NPI record?

Cross-check NPI 1134103310 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1134103310 active?

Yes, as of the latest NPPES snapshot, NPI 1134103310 is active (record last updated 2011-07-26).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-07-26.