Quick answers
- Which hospitals does Matthew B. Dewys work at?
- Medicare's official clinician data lists Matthew B. Dewys at 2 hospitals: McLaren Bay Region and McLaren Greater Lansing. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Matthew B. Dewys see patients?
- Medicare's clinician data lists 3 practice locations, including Cedar Springs, MI, Lansing, MI and Oxford, MI. Call before your visit to confirm the address.
- What is Matthew B. Dewys's specialty?
- Medicare lists Emergency Medicine as the primary specialty, and also Internal Medicine.
- Does Matthew B. Dewys accept Medicare assignment?
- Yes. Medicare's clinician data says Matthew B. Dewys 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 Matthew B. Dewys?
- (616) 696-2020, as listed in official Medicare / NPI Registry data.
- What is Matthew B. Dewys's NPI number?
- 1427151083. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Matthew B. Dewys works
Medicare's Facility Affiliation Data lists Matthew B. Dewys 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
- McLaren Greater LansingLansing, MI · Acute Care Hospital · CCN 230167
Practice locations
Addresses where Matthew B. Dewys is enrolled with Medicare (CMS data updated 2026-10-02).
- 261 N MainCedar Springs, MI 49319 (616) 696‑2020
- 2900 Collins RdLansing, MI 48910 (517) 975‑7500
- 385 N Lapeer RdOxford, MI 48371 (248) 628‑3000
Group practices
Medicare enrollment lists Matthew B. Dewys as a member of these groups (CMS data updated 2026-10-02).
- McLaren Hospital Group375 clinicians in the group
- White Pine Family Medicine PLLC9 clinicians in the group
Specialties
- Emergency Medicineprimary
- Internal Medicinealso
Other emergency medicine doctors in Michigan
Clinicians with the same Medicare primary specialty in Michigan — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Midwestern University, Chicago College Of Osteopathic Med |
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1427151083 |
| 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