Quick answers
- Which hospitals does William G. Matthaeus work at?
- Medicare's official clinician data lists William G. Matthaeus at 3 hospitals: Aurora Medical Center Sheboygan County, Aurora St Lukes Medical Center and West Allis Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William G. Matthaeus see patients?
- Medicare's clinician data lists 2 practice locations, including Sheboygan, WI and Milwaukee, WI. Call before your visit to confirm the address.
- What is William G. Matthaeus's specialty?
- Medicare lists Hematology/Oncology as the primary specialty, and also Hospice/Palliative Care.
- Does William G. Matthaeus accept Medicare assignment?
- Yes. Medicare's clinician data says William G. Matthaeus 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.
- Does William G. Matthaeus offer telehealth?
- Medicare's clinician data says William G. Matthaeus offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for William G. Matthaeus?
- (920) 457-6800, as listed in official Medicare / NPI Registry data.
- What is William G. Matthaeus's NPI number?
- 1326039074. 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 G. Matthaeus works
Medicare's Facility Affiliation Data lists William G. Matthaeus at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Aurora Medical Center Sheboygan CountySheboygan, WI · Acute Care Hospital · CCN 520035
- Aurora St Lukes Medical CenterMilwaukee, WI · Acute Care Hospital · CCN 520138
- West Allis Memorial HospitalWest Allis, WI · Acute Care Hospital · CCN 520139
Practice locations
Addresses where William G. Matthaeus is enrolled with Medicare (CMS data updated 2026-10-02).
- 1222 N 23rd StSheboygan, WI 53081 (920) 457‑6800
- 2900 W Oklahoma AveMilwaukee, WI 53215 (414) 649‑6000
Group practices
Medicare enrollment lists William G. Matthaeus as a member of these groups (CMS data updated 2026-10-02).
- Aurora Health Care Metro, Inc.75 clinicians in the group
- Aurora Health Care Central, Inc.10 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Hospice/Palliative Carealso
Other hematologist-oncologists in Sheboygan
Clinicians with the same Medicare primary specialty in Sheboygan, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1326039074 |
| 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