Quick answers
- Which hospitals does Michael G. Hartmann work at?
- Medicare's official clinician data lists Michael G. Hartmann at 2 hospitals: Aurora Medical Center Bay Area and HSHS St Clare Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael G. Hartmann see patients?
- Medicare's clinician data lists 3 practice locations, including Green Bay, WI, Marinette, WI and Oconto Falls, WI. Call before your visit to confirm the address.
- What is Michael G. Hartmann's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Michael G. Hartmann accept Medicare assignment?
- Yes. Medicare's clinician data says Michael G. Hartmann accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Michael G. Hartmann?
- (920) 498-4200, as listed in official Medicare / NPI Registry data.
- What is Michael G. Hartmann's NPI number?
- 1215986930. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michael G. Hartmann works
Medicare's Facility Affiliation Data lists Michael G. Hartmann at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Aurora Medical Center Bay AreaMarinette, WI · Acute Care Hospital · CCN 520113
- HSHS St Clare Memorial HospitalOconto Falls, WI · Critical Access Hospital · CCN 521310
Practice locations
Addresses where Michael G. Hartmann is enrolled with Medicare (CMS data updated 2026-10-02).
- 1726 Shawano AveGreen Bay, WI 54303 (920) 498‑4200
- 3003 University DrMarinette, WI 54143 (715) 735‑6621
- 855 S Main StOconto Falls, WI 54154 (920) 846‑3444
Group practices
Medicare enrollment lists Michael G. Hartmann as a member of these groups (CMS data updated 2026-10-02).
- Aurora Medical Group, Inc.3,813 clinicians in the group
- Vituity-Wisconsin Em SC56 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Green Bay
Clinicians with the same Medicare primary specialty in Green Bay, WI — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Midwestern University, Chicago College Of Osteopathic Med |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215986930 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians