Quick answers
- Which hospitals does William Fabricius work at?
- Medicare's official clinician data lists William Fabricius at 5 hospitals: Corewell Health Big Rapids Hospital, Corewell Health Reed City Hospital, Mercy Health Saint Mary's, Spectrum Health and Spectrum Health United Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Fabricius see patients?
- Medicare's clinician data lists 5 practice locations, including Grand Rapids, MI. Call before your visit to confirm the address.
- What is William Fabricius's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does William Fabricius accept Medicare assignment?
- Yes. Medicare's clinician data says William Fabricius 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 William Fabricius?
- (616) 954-9800, as listed in official Medicare / NPI Registry data.
- What is William Fabricius's NPI number?
- 1568698645. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William Fabricius works
Medicare's Facility Affiliation Data lists William Fabricius at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Corewell Health Big Rapids HospitalBig Rapids, MI · Acute Care Hospital · CCN 230093
- Corewell Health Reed City HospitalReed City, MI · Critical Access Hospital · CCN 231323
- Mercy Health Saint Mary'sGrand Rapids, MI · Acute Care Hospital · CCN 230059
- Spectrum HealthGrand Rapids, MI · Acute Care Hospital · CCN 230038
- Spectrum Health United HospitalGreenville, MI · Acute Care Hospital · CCN 230035
Practice locations
Addresses where William Fabricius is enrolled with Medicare (CMS data updated 2026-10-02).
- 145 Michigan St NE, Suite 3100Grand Rapids, MI 49503 (616) 954‑9800
- 5060 Cascade RdGrand Rapids, MI 49546
- 5060 Cascade Rd, Suite AGrand Rapids, MI 49546
- 5060 Cascade Rd SEGrand Rapids, MI 49546
- 5060 Cascade Rd SE, Suite AGrand Rapids, MI 49546
Group practices
Medicare enrollment lists William Fabricius as a member of these groups (CMS data updated 2026-10-02).
- Center for Physical Rehabilitation and Therapy LP369 clinicians in the group
- Center for Physical Rehabilitation Inc357 clinicians in the group
- Cancer and Hematology Centers of Western Mi, P.C.110 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Grand Rapids
Clinicians with the same Medicare primary specialty in Grand Rapids, MI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1568698645 |
| 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