Quick answers
- Which hospitals does Gregg B. Hanert work at?
- Medicare's official clinician data lists Gregg B. Hanert at 4 hospitals: McLaren Bay Region, Munson Healthcare Cadillac Hospital, Munson Healthcare Grayling Hospital and Munson Healthcare Otsego Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregg B. Hanert see patients?
- Medicare's clinician data lists 3 practice locations, including Grayling, MI, Mio, MI and Gaylord, MI. Call before your visit to confirm the address.
- What is Gregg B. Hanert's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Gregg B. Hanert accept Medicare assignment?
- Yes. Medicare's clinician data says Gregg B. Hanert 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 Gregg B. Hanert?
- (989) 348-0550, as listed in official Medicare / NPI Registry data.
- What is Gregg B. Hanert's NPI number?
- 1366439044. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregg B. Hanert works
Medicare's Facility Affiliation Data lists Gregg B. Hanert at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- McLaren Bay RegionBay City, MI · Acute Care Hospital · CCN 230041
- Munson Healthcare Cadillac HospitalCadillac, MI · Acute Care Hospital · CCN 230081
- Munson Healthcare Grayling HospitalGrayling, MI · Acute Care Hospital · CCN 230058
- Munson Healthcare Otsego Memorial HospitalGaylord, MI · Acute Care Hospital · CCN 230133
Practice locations
Addresses where Gregg B. Hanert is enrolled with Medicare (CMS data updated 2026-10-02).
- 1250 E Michigan Ave, Grayling Community Health CenterGrayling, MI 49738 (989) 348‑0550
- 1321 S Mount Tom RdMio, MI 48647 (989) 275‑1200
- 1996 Walden, Otsego County Memorial HospitalGaylord, MI 49735
Group practices
Medicare enrollment lists Gregg B. Hanert as a member of these groups (CMS data updated 2026-10-02).
- Munson Healthcare Otsego Memorial Hospital120 clinicians in the group
- Munson Healthcare Grayling66 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Grayling
Clinicians with the same Medicare primary specialty in Grayling, MI — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Michigan State University College Of Osteopathic Medicine |
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366439044 |
| 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