Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Zachary Mclean Oswald, O.D.

Optometrist in Dillon, MT · enumerated 2011.

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

National Provider Identifier

1275810079

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Registry record

Entity type Individual (Type 1)

Name Dr. Zachary Mclean Oswald

Credential O.D.

Sex Male

Practice address 25 Johnson Ave, Dillon, MT, 59725

Phone (406) 683-2020

Fax (406) 683-6409

Enumeration date Nov 8, 2011

Last updated in NPPES Mar 25, 2020

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 9885098-9934 (UT) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 3437ATI (OR) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License ODP-100231 (ID) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License OPT-OPT-LIC-3096 (MT) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

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 NPI 1275810079 active?

Yes, as of the latest NPPES snapshot, NPI 1275810079 is active (record last updated 2020-03-25).

How do I verify Zachary Oswald's NPI record?

Cross-check NPI 1275810079 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Bradley Kepp Optometrist · Dillon, MT NPI 1982786042 Bradley P Kepp Od PC Optometrist · Dillon, MT NPI 1134342421 Zachary M Oswald Pllc Optometrist · Dillon, MT NPI 1124516943

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-03-25.