Quick answers
- Which hospitals does Quentin J. Mattern work at?
- Medicare's official clinician data lists Quentin J. Mattern at 2 hospitals: Ascension Columbia St Marys Hospital Milwaukee and Orthopaedic Hospital of Wisconsin. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Quentin J. Mattern see patients?
- Medicare's clinician data lists 1 practice location in Glendale, WI. Call before your visit to confirm the address.
- What is Quentin J. Mattern's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Quentin J. Mattern accept Medicare assignment?
- Yes. Medicare's clinician data says Quentin J. Mattern 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 Quentin J. Mattern?
- (414) 961-6800, as listed in official Medicare / NPI Registry data.
- What is Quentin J. Mattern's NPI number?
- 1003996158. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Quentin J. Mattern works
Medicare's Facility Affiliation Data lists Quentin J. Mattern at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension Columbia St Marys Hospital MilwaukeeMilwaukee, WI · Acute Care Hospital · CCN 520051
- Orthopaedic Hospital of WisconsinGlendale, WI · Acute Care Hospital · CCN 520194
Practice locations
Addresses where Quentin J. Mattern is enrolled with Medicare (CMS data updated 2026-10-02).
- 475 W River Woods PkwyGlendale, WI 53212 (414) 961‑6800
Group practices
Medicare enrollment lists Quentin J. Mattern as a member of this group (CMS data updated 2026-10-02).
- Orthopaedic Hospital of Wisconsin, LLC42 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Glendale
Clinicians with the same Medicare primary specialty in Glendale, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rush Medical College Of Rush University |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003996158 |
| 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