Quick answers
- Where does Michael Tsimis see patients?
- Medicare's clinician data lists 6 practice locations, including Grand Rapids, MI, Muskegon, MI and Kentwood, MI. Call before your visit to confirm the address.
- What is Michael Tsimis's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Michael Tsimis accept Medicare assignment?
- Yes. Medicare's clinician data says Michael Tsimis 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 Tsimis?
- (616) 267-0115, as listed in official Medicare / NPI Registry data.
- What is Michael Tsimis's NPI number?
- 1174840185. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Michael Tsimis is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 100 Michigan Ave NEGrand Rapids, MI 49503
- 100 Michigan St NE Rm, 280 Corewell Health Medical Group WestGrand Rapids, MI 49503 (616) 267‑0115
- 1675 Leahy St, Suite 201aMuskegon, MI 49442 (231) 672‑6600
- 25 Michigan St NE, Corewell Health Medical Group WestGrand Rapids, MI 49503 (616) 267‑8950
- 4444 Kalamazoo Ave SE, 200 Corewell Health Medical Group WestKentwood, MI 49508 (616) 391‑5600
Group practices
Medicare enrollment lists Michael Tsimis as a member of these groups (CMS data updated 2026-10-02).
- Spectrum Health Primary Care Partners2,294 clinicians in the group
- Mercy Women's Health Services12 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Grand Rapids
Clinicians with the same Medicare primary specialty in Grand Rapids, MI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wayne State University School Of Medicine |
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1174840185 |
| 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
- 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