Quick answers
- Which hospitals does John Rizik work at?
- Medicare's official clinician data lists John Rizik at 1 hospital: Spectrum Health. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Rizik see patients?
- Medicare's clinician data lists 4 practice locations, including Grand Rapids, MI and Kentwood, MI. Call before your visit to confirm the address.
- What is John Rizik's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John Rizik accept Medicare assignment?
- Yes. Medicare's clinician data says John Rizik 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 John Rizik?
- (616) 267-0115, as listed in official Medicare / NPI Registry data.
- What is John Rizik's NPI number?
- 1790245538. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Rizik works
Medicare's Facility Affiliation Data lists John Rizik at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Spectrum HealthGrand Rapids, MI · Acute Care Hospital · CCN 230038
Practice locations
Addresses where John Rizik is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Michigan Ave NEGrand Rapids, MI 49503
- 100 Michigan St NE Rm, 280 Corewell Health Medical Group WestGrand Rapids, MI 49503 (616) 267‑0115
- 1900 Wealthy St SEGrand Rapids, MI 49506
- 4444 Kalamazoo Ave SE, 200 Corewell Health Medical Group WestKentwood, MI 49508 (616) 391‑5600
Group practices
Medicare enrollment lists John Rizik as a member of this group (CMS data updated 2026-10-02).
- Spectrum Health Primary Care Partners2,294 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Grand Rapids
Clinicians with the same Medicare primary specialty in Grand Rapids, MI — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Arizona College Of Osteopathic Medicine Mid Western University |
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1790245538 |
| 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