Quick answers
- Which hospitals does Mark Clemence work at?
- Medicare's official clinician data lists Mark Clemence at 5 hospitals: Ascension Columbia St Marys Hospital Milwaukee, Ascension SE Wisconsin Hospital, Ascension St Francis Hospital, Midwest Orthopedic Specialty Hospital and West Allis Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Clemence see patients?
- Medicare's clinician data lists 2 practice locations, including Brookfield, WI and Greenfield, WI. Call before your visit to confirm the address.
- What is Mark Clemence's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Infectious Disease.
- Does Mark Clemence accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Clemence 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 Mark Clemence offer telehealth?
- Medicare's clinician data says Mark Clemence offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mark Clemence?
- (414) 302-5400, as listed in official Medicare / NPI Registry data.
- What is Mark Clemence's NPI number?
- 1255324216. 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 Clemence works
Medicare's Facility Affiliation Data lists Mark Clemence 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
- Ascension St Francis HospitalMilwaukee, WI · Acute Care Hospital · CCN 520078
- Midwest Orthopedic Specialty HospitalFranklin, WI · Acute Care Hospital · CCN 520205
- West Allis Memorial HospitalWest Allis, WI · Acute Care Hospital · CCN 520139
Practice locations
Addresses where Mark Clemence is enrolled with Medicare (CMS data updated 2026-10-02).
- 13950 W Capitol DrBrookfield, WI 53005 (414) 302‑5400
- 4935 S 76th St, Suite 101Greenfield, WI 53220 (414) 777‑3100
Group practices
Medicare enrollment lists Mark Clemence as a member of this group (CMS data updated 2026-10-02).
- Ascension Medical Group-Southeast Wisconsin Inc545 clinicians in the group
Specialties
- Internal Medicineprimary
- Infectious Diseasealso
Other internal medicine doctors in Brookfield
Clinicians with the same Medicare primary specialty in Brookfield, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1255324216 |
| 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