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About this NPIWhat this record shows.
NPI 1023100732 is registered to Big Sky Internal Medicine, a healthcare organisation classified as "Internal Medicine" and located at 310 Wendell Ave Ste 101 in Lewistown, Montana. The organisation's authorised official is Janet Grensten. The organisation has been enumerated in the NPI registry since 2006.
Provider type
Organisation (Type 2)
Status
Active
Enumerated
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The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Big Sky Internal Medicine accepts. To confirm in-network status with your specific health plan, contact Big Sky Internal Medicine directly at (406) 535-1490.
Frequently asked
Yes. NPI 1023100732 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Internal Medicine physicians (internists) specialise in the prevention, diagnosis, and treatment of diseases in adults, often coordinating care across multiple subspecialties.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (406) 535-1490.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Big Sky Internal Medicine is a Type-2 organisational NPI.
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