Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Barr J Petersen, M.D.

Hospitalist Physician in Billings, MT · enumerated 2008.

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

National Provider Identifier

1497933667

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Registry record

Entity type Individual (Type 1)

Name Dr. Barr J Petersen

Credential M.D.

Sex Male

Practice address 2800 10th Ave N, Billings, MT, 59101

Phone (406) 238-4145

Enumeration date Feb 9, 2008

Last updated in NPPES Feb 4, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A125745 (CA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 42002 (AZ) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 6851493-1205 (UT) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 48400 (MT) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License MED-PHYS-LIC-48400 (MT) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 1497933667 active?

Yes, as of the latest NPPES snapshot, NPI 1497933667 is active (record last updated 2025-02-04).

How do I verify Barr Petersen's NPI record?

Cross-check NPI 1497933667 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-04.