Quick answers
- Which hospitals does Mark P. Ridder work at?
- Medicare's official clinician data lists Mark P. Ridder at 5 hospitals: Marshfield Medical Center, Marshfield Medical Center - Eau Claire, Marshfield Medical Center - Neillsville, Marshfield Medical Center - Rice Lake and Marshfield Medical Center - Weston. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark P. Ridder see patients?
- Medicare's clinician data lists 8 practice locations, including Marshfield, WI, Rice Lake, WI and Park Falls, WI. Call before your visit to confirm the address.
- What is Mark P. Ridder's specialty?
- Medicare lists Infectious Disease as the primary specialty.
- Does Mark P. Ridder accept Medicare assignment?
- Yes. Medicare's clinician data says Mark P. Ridder 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 P. Ridder offer telehealth?
- Medicare's clinician data says Mark P. Ridder offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mark P. Ridder?
- (715) 387-5511, as listed in official Medicare / NPI Registry data.
- What is Mark P. Ridder's NPI number?
- 1821542739. 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 P. Ridder works
Medicare's Facility Affiliation Data lists Mark P. Ridder at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Marshfield Medical CenterMarshfield, WI · Acute Care Hospital · CCN 520037
- Marshfield Medical Center - Eau ClaireEau Claire, WI · Acute Care Hospital · CCN 520210
- Marshfield Medical Center - NeillsvilleNeillsville, WI · Critical Access Hospital · CCN 521323
- Marshfield Medical Center - Rice LakeRice Lake, WI · Acute Care Hospital · CCN 520011
- Marshfield Medical Center - WestonWeston, WI · Acute Care Hospital · CCN 520202
Practice locations
Addresses where Mark P. Ridder is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 8; the Medicare profile lists all.
- 1000 N Oak AveMarshfield, WI 54449 (715) 387‑5511
- 1700 W Stout StRice Lake, WI 54868 (715) 236‑6133
- 1700 W Stout St, Suite 400Rice Lake, WI 54868 (715) 236‑6133
- 250 Lawrence AvePark Falls, WI 54552 (715) 762‑2449
- 2727 Plaza DrMarshfield, WI 54449
Group practices
Medicare enrollment lists Mark P. Ridder as a member of these groups (CMS data updated 2026-10-02).
- MCHS Hospitals Inc1,197 clinicians in the group
- Lakeview Medical Center Inc of Rice Lake168 clinicians in the group
- Flambeau Hospital, Inc.38 clinicians in the group
Specialties
- Infectious Diseaseprimary
Other infectious disease doctors in Marshfield
Clinicians with the same Medicare primary specialty in Marshfield, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Sanford School Of Medicine Of University Of South Dakota |
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1821542739 |
| 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