Quick answers
- Does Paul J. Ruh accept Medicare assignment?
- Yes. Medicare's clinician data says Paul J. Ruh accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Paul J. Ruh see?
- In 2024, CMS data shows 363 Original Medicare patients and 791 services for Paul J. Ruh. This counts Original Medicare only and measures volume, not quality.
- What is Paul J. Ruh's NPI number?
- 1578670832. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Paul J. Ruh, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 363 |
|---|---|
| Services billed to Medicare | 791 |
| Different services or procedures | 48 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)158 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)142 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)102 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)60 services
- Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm (43249)40 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure66%
- High cholesterol64%
- Arthritis37%
- Diabetes27%
- Ischemic heart disease23%
- Anxiety22%
Hospitals where Paul J. Ruh works
Medicare's Facility Affiliation Data lists Paul J. Ruh at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Aspirus Stanley HospitalStanley, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521311
- Chippewa Valley HospitalDurand, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521307
- Marshfield Medical CenterMarshfield, WI · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 520037
- Marshfield Medical Center - Eau ClaireEau Claire, WI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 520210
- Oakleaf Surgical HospitalAltoona, WI · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 520196
Practice locations
Addresses where Paul J. Ruh is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 N Oak AveMarshfield, WI 54449 (715) 387‑5511
- 2310 Craig RdEau Claire, WI 54701 (715) 858‑8100
- 4109 Oakwood Hills PkwyEau Claire, WI 54701 (715) 552‑7303
Group practices
Medicare enrollment lists Paul J. Ruh as a member of these groups (CMS data updated October 2, 2026).
- MCHS Hospitals Inc1,197 clinicians in the group
- Eau Claire Gi Associates SC7 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Marshfield
Clinicians with the same Medicare primary specialty in Marshfield, WI — not a recommendation.
Other clinicians in MCHS Hospitals Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Wisconsin School Of Medicine |
| Graduation year | 1991 (35 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1578670832 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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