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Dr. Stephen John Mest, MD

Internal Medicine Physician in Helena, MT · enumerated 2006.

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

National Provider Identifier

1093816621

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Registry record

Entity type Individual (Type 1)
Name Dr. Stephen John Mest
Credential MD
Sex Male
Practice address 2475 Broadway, Helena, MT, 59601
Phone (406) 457-4180
Enumeration date Sep 26, 2006
Last updated in NPPES Apr 12, 2018

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 8243 (MT) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 8243 (MT) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
98825 Other MO BCCBS OF MT
0086258 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

Where does Stephen Mest practice?
The practice location on file with NPPES is in Helena, MT. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Stephen Mest?
The National Provider Identifier (NPI) for Stephen Mest is 1093816621, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-04-12.