Quick answers
- Which hospitals does Thomas R. Berentsen work at?
- Medicare's official clinician data lists Thomas R. Berentsen at 1 hospital: SSM Health St Mary's Hospital - Janesville. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Thomas R. Berentsen see patients?
- Medicare's clinician data lists 3 practice locations, including Watertown, WI, Madison, WI and Janesville, WI. Call before your visit to confirm the address.
- What is Thomas R. Berentsen's specialty?
- Medicare lists Neurology as the primary specialty, and also Sleep Medicine.
- Does Thomas R. Berentsen accept Medicare assignment?
- Yes. Medicare's clinician data says Thomas R. Berentsen 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 Thomas R. Berentsen?
- (920) 206-6500, as listed in official Medicare / NPI Registry data.
- What is Thomas R. Berentsen's NPI number?
- 1477593036. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Thomas R. Berentsen works
Medicare's Facility Affiliation Data lists Thomas R. Berentsen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- SSM Health St Mary's Hospital - JanesvilleJanesville, WI · Acute Care Hospital · CCN 520208
Practice locations
Addresses where Thomas R. Berentsen is enrolled with Medicare (CMS data updated 2026-10-02).
- 123 Hospital Dr, Suite 1008Watertown, WI 53098 (920) 206‑6500
- 2501 W Beltline Hwy, Suite 601Madison, WI 53713 (608) 234‑7436
- 3200 E Racine StJanesville, WI 53546 (608) 371‑8000
Group practices
Medicare enrollment lists Thomas R. Berentsen as a member of these groups (CMS data updated 2026-10-02).
- Dean Health Systems Inc1,159 clinicians in the group
- Orthopedic and Spine Centers of Wisconsin SC25 clinicians in the group
Specialties
- Neurologyprimary
- Sleep Medicinealso
Other neurologists in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Wisconsin School Of Medicine |
| Graduation year | 1977 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1477593036 |
| 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