Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michelle R Aerni, D.O.

Critical Care Medicine (Anesthesiology) Physician in Flagstaff, AZ · enumerated 2005.

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

National Provider Identifier

1225014822

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Registry record

Entity type Individual (Type 1)

Name Dr. Michelle R Aerni

Credential D.O.

Sex Female

Practice address 1200 N Beaver St, Flagstaff, AZ, 86001

Phone (928) 779-3366

Enumeration date Dec 16, 2005

Last updated in NPPES May 12, 2021

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 46919 (MN) Secondary

207LC0200X Critical Care Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License 006768 (AZ) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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

What is the NPI number for Michelle Aerni?

The National Provider Identifier (NPI) for Michelle Aerni is 1225014822, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michelle Aerni practice?

The practice location on file with NPPES is in Flagstaff, AZ. 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 2021-05-12.