Quick answers
- Does Matthew R. Karek accept Medicare assignment?
- Yes. Medicare's clinician data says Matthew R. Karek accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Matthew R. Karek see?
- In 2024, CMS data shows 108 Original Medicare patients and 280 services for Matthew R. Karek. This counts Original Medicare only and measures volume, not quality.
- What is Matthew R. Karek's NPI number?
- 1861620718. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Matthew R. Karek, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 108 |
|---|---|
| Services billed to Medicare | 280 |
| Different services or procedures | 55 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)44 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)35 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)21 services
- Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)19 services
- Computer-assisted spinal procedure (61783)13 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis75%
- Anxiety46%
- Diabetes38%
- Depression38%
Hospitals where Matthew R. Karek works
Medicare's Facility Affiliation Data lists Matthew R. Karek at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Corewell Health Big Rapids HospitalBig Rapids, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230093
- Corewell Health Ludington HospitalLudington, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230110
- Corewell Health Reed City HospitalReed City, MI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 231323
- Spectrum HealthGrand Rapids, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230038
Practice locations
Addresses where Matthew R. Karek is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 10; 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
- 1840 Wealthy St SE, Corewell Health Medical Group WestGrand Rapids, MI 49506 (616) 885‑5000
- 1900 Wealthy St SEGrand Rapids, MI 49506
- 212 S Sullivan Ave, Corewell Health Medical Group WestFremont, MI 49412 (616) 391‑3139
Group practices
Medicare enrollment lists Matthew R. Karek as a member of these groups (CMS data updated October 2, 2026).
- Spectrum Health Primary Care Partners2,294 clinicians in the group
- Center for Physical Rehabilitation and Therapy LP369 clinicians in the group
- Center for Physical Rehabilitation Inc357 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Grand Rapids
Clinicians with the same Medicare primary specialty in Grand Rapids, MI — not a recommendation.
Other clinicians in Spectrum Health Primary Care Partners
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Michigan State University College Of Human Medicine |
| Graduation year | 2009 (17 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1861620718 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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