Quick answers
- Does Sean Theisen accept Medicare assignment?
- Yes. Medicare's clinician data says Sean Theisen 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 Sean Theisen see?
- In 2024, CMS data shows 1,724 Original Medicare patients and 2,573 services for Sean Theisen. This counts Original Medicare only and measures volume, not quality.
- What is Sean Theisen's NPI number?
- 1508805243. 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 Sean Theisen, 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 | 1,724 |
|---|---|
| Services billed to Medicare | 2,573 |
| Different services or procedures | 100 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Screening mammography (77067)367 services
- Screening 3d breast mammography (77063)365 services
- X-ray of chest, 1 view (71045)208 services
- Mri scan of leg joint without contrast (73721)108 services
- Ct scan of abdomen and pelvis with contrast (74177)107 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 pressure73%
- High cholesterol72%
- Arthritis57%
- Ischemic heart disease33%
- Anxiety33%
- Diabetes31%
Hospitals where Sean Theisen works
Medicare's Facility Affiliation Data lists Sean Theisen 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.
- Ascension NE Wisconsin - St Elizabeth CampusAppleton, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520009
- Southwest Health CenterPlatteville, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521354
- SSM Health St Agnes Hospital-Fond Du LacFond Du Lac, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520088
- Thedacare Regional Medical Center - Appleton IncAppleton, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520160
- Thedacare Regional Medical Center - NeenahNeenah, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520045
Practice locations
Addresses where Sean Theisen is enrolled with Medicare (CMS data updated October 2, 2026).
- 1205 W American DrNeenah, WI 54956 (920) 430‑8113
- 2223 Lime Kiln Rd, Suite 1Green Bay, WI 54311 (920) 430‑8113
Group practices
Medicare enrollment lists Sean Theisen as a member of these groups (CMS data updated October 2, 2026).
- Radiology Associates of the Fox Valley SC81 clinicians in the group
- Orthopedic and Sports Medicine Specialists of Green Bay, SC50 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Neenah
Clinicians with the same Medicare primary specialty in Neenah, WI — not a recommendation.
Other clinicians in Radiology Associates of the Fox Valley SC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 1996 (30 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508805243 |
| 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