Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael George Hartmann, DO

Emergency Medicine Physician in Marinette, WI · enumerated 2006.

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

National Provider Identifier

1215986930

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Registry record

Entity type Individual (Type 1)

Name Michael George Hartmann

Credential DO

Sex Male

Practice address 3003 University Dr, Marinette, WI, 54143

Phone (715) 735-4200

Fax (715) 735-8019

Enumeration date May 9, 2006

Last updated in NPPES Jul 16, 2024

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 50251 (WI) 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

Other identifiers

Identifier	Type	State	Issuer
43541400	Medicaid	WI	-

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 Michael Hartmann?

The National Provider Identifier (NPI) for Michael Hartmann is 1215986930, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michael Hartmann practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-16.