Quick answers
- Which hospitals does Mario Kapetsonis work at?
- Medicare's official clinician data lists Mario Kapetsonis at 3 hospitals: Ascension Columbia St Marys Hospital Milwaukee, Ascension SE Wisconsin Hospital and Orthopaedic Hospital of Wisconsin. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mario Kapetsonis see patients?
- Medicare's clinician data lists 1 practice location in Shorewood, WI. Call before your visit to confirm the address.
- What is Mario Kapetsonis's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Mario Kapetsonis accept Medicare assignment?
- Yes. Medicare's clinician data says Mario Kapetsonis 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 Mario Kapetsonis?
- (414) 962-7477, as listed in official Medicare / NPI Registry data.
- What is Mario Kapetsonis's NPI number?
- 1306833991. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mario Kapetsonis works
Medicare's Facility Affiliation Data lists Mario Kapetsonis 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
- Ascension SE Wisconsin HospitalMilwaukee, WI · Acute Care Hospital · CCN 520136
- Orthopaedic Hospital of WisconsinGlendale, WI · Acute Care Hospital · CCN 520194
Practice locations
Addresses where Mario Kapetsonis is enrolled with Medicare (CMS data updated 2026-10-02).
- 4027 N Oakland AveShorewood, WI 53211 (414) 962‑7477
Group practices
Medicare enrollment lists Mario Kapetsonis as a member of this group (CMS data updated 2026-10-02).
- Columbia St Marys Hospital Milwaukee Inc306 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306833991 |
| 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