Quick answers
- Which hospitals does Mark J. Schaefer work at?
- Medicare's official clinician data lists Mark J. Schaefer at 1 hospital: West Allis Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark J. Schaefer see patients?
- Medicare's clinician data lists 1 practice location in West Allis, WI. Call before your visit to confirm the address.
- What is Mark J. Schaefer's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Mark J. Schaefer accept Medicare assignment?
- Yes. Medicare's clinician data says Mark J. Schaefer 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 Mark J. Schaefer?
- (414) 329-5930, as listed in official Medicare / NPI Registry data.
- What is Mark J. Schaefer's NPI number?
- 1629052428. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark J. Schaefer works
Medicare's Facility Affiliation Data lists Mark J. Schaefer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- West Allis Memorial HospitalWest Allis, WI · Acute Care Hospital · CCN 520139
Practice locations
Addresses where Mark J. Schaefer is enrolled with Medicare (CMS data updated 2026-10-02).
- 8901 W Lincoln AveWest Allis, WI 53227 (414) 329‑5930
Group practices
Medicare enrollment lists Mark J. Schaefer as a member of this group (CMS data updated 2026-10-02).
- Aurora Medical Group, Inc.3,813 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in West Allis
Clinicians with the same Medicare primary specialty in West Allis, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1629052428 |
| 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