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

Dr. Steve Marquis Mosby, DDS

General Practice Dentistry in Lewistown, MT · enumerated 2007.

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

National Provider Identifier

1275673618

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Registry record

Entity type Individual (Type 1)
Name Dr. Steve Marquis Mosby
Credential DDS
Sex Male
Practice address Lewistown, MT, 59457
Phone (406) 535-2084
Fax (406) 535-2087
Enumeration date Feb 7, 2007
Last updated in NPPES Apr 6, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

122300000X Dentist Dental Providers · License 2382 (MT) Secondary
1223G0001X General Practice Dentistry Dental Providers · License 31336 (CA) Primary
DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier Type State Issuer
DP 2382 Other MT DP 2382
DP 31336 Other CA 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.

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Frequently asked questions

What is the NPI number for Steve Mosby?
The National Provider Identifier (NPI) for Steve Mosby is 1275673618, a Type 1 (individual) record in the CMS NPPES registry.
Where does Steve Mosby practice?
The practice location on file with NPPES is in Lewistown, MT. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-06.