Quick answers
- Which hospitals does Colleen A. Hartwig work at?
- Medicare's official clinician data lists Colleen A. Hartwig at 1 hospital: Beaumont Hospital - Farmington Hills. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Colleen A. Hartwig see patients?
- Medicare's clinician data lists 6 practice locations, including Farmington Hills, MI, Wayne, MI and Royal Oak, MI. Call before your visit to confirm the address.
- What is Colleen A. Hartwig's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Colleen A. Hartwig accept Medicare assignment?
- Yes. Medicare's clinician data says Colleen A. Hartwig 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 Colleen A. Hartwig?
- (248) 898-0575, as listed in official Medicare / NPI Registry data.
- What is Colleen A. Hartwig's NPI number?
- 1720056757. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Colleen A. Hartwig works
Medicare's Facility Affiliation Data lists Colleen A. Hartwig at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Beaumont Hospital - Farmington HillsFarmington Hills, MI · Acute Care Hospital · CCN 230151
Practice locations
Addresses where Colleen A. Hartwig is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 28050 Grand River AveFarmington Hills, MI 48336
- 33155 Annapolis StWayne, MI 48184
- 3601 W 13 Mile RdRoyal Oak, MI 48073
- 3601 W 13 Mile Rd Ec, Beaumont Emergency Services RoRoyal Oak, MI 48073 (248) 898‑0575
- 44201 Dequindre RdTroy, MI 48085
Group practices
Medicare enrollment lists Colleen A. Hartwig as a member of this group (CMS data updated 2026-10-02).
- Beaumont Medical Group Hospital Based Services584 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Farmington Hills
Clinicians with the same Medicare primary specialty in Farmington Hills, MI — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Michigan State University College Of Osteopathic Medicine |
| Graduation year | 1995 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720056757 |
| 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