Quick answers
- Which hospitals does Willis J. Rieker work at?
- Medicare's official clinician data lists Willis J. Rieker at 1 hospital: Beloit Health System. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Willis J. Rieker see patients?
- Medicare's clinician data lists 1 practice location in Beloit, WI. Call before your visit to confirm the address.
- What is Willis J. Rieker's specialty?
- Medicare lists Pathology as the primary specialty.
- Does Willis J. Rieker accept Medicare assignment?
- Yes. Medicare's clinician data says Willis J. Rieker 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 Willis J. Rieker?
- (608) 364-5131, as listed in official Medicare / NPI Registry data.
- What is Willis J. Rieker's NPI number?
- 1689714834. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Willis J. Rieker works
Medicare's Facility Affiliation Data lists Willis J. Rieker at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Beloit Health SystemBeloit, WI · Acute Care Hospital · CCN 520100
Practice locations
Addresses where Willis J. Rieker is enrolled with Medicare (CMS data updated 2026-10-02).
- 1969 W Hart RdBeloit, WI 53511 (608) 364‑5131
Group practices
Medicare enrollment lists Willis J. Rieker as a member of this group (CMS data updated 2026-10-02).
- Hart Road Pathology, SC3 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1689714834 |
| 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