Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Aaron Michael Flanagan, M.D.

Physical Medicine & Rehabilitation Physician in Great Falls, MT · enumerated 2011.

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

National Provider Identifier

1689973927

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Registry record

Entity type Individual (Type 1)

Name Dr. Aaron Michael Flanagan

Credential M.D.

Sex Male

Practice address 500 15th Ave S, Suite 1, Great Falls, MT, 59405

Phone (406) 455-2140

Enumeration date Mar 25, 2011

Last updated in NPPES Aug 27, 2015

Taxonomy & licenses

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License 41650 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Aaron Flanagan practice?

The practice location on file with NPPES is in Great Falls, MT. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Aaron Flanagan?

The National Provider Identifier (NPI) for Aaron Flanagan is 1689973927, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-08-27.