Quick answers
- Which hospitals does Derek T. Tessman work at?
- Medicare's official clinician data lists Derek T. Tessman at 5 hospitals: Columbus Community Hospital, Richland Hospital, SSM Health St Clare Hospital - Baraboo, SSM Health St Mary's Hospital - Madison and The Monroe Clinic. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Derek T. Tessman see patients?
- Medicare's clinician data lists 1 practice location in Madison, WI. Call before your visit to confirm the address.
- What is Derek T. Tessman's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does Derek T. Tessman accept Medicare assignment?
- Yes. Medicare's clinician data says Derek T. Tessman 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 Derek T. Tessman?
- (608) 251-6100, as listed in official Medicare / NPI Registry data.
- What is Derek T. Tessman's NPI number?
- 1275023988. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Derek T. Tessman works
Medicare's Facility Affiliation Data lists Derek T. Tessman at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Columbus Community HospitalColumbus, WI · Critical Access Hospital · CCN 521338
- Richland HospitalRichland Center, WI · Critical Access Hospital · CCN 521341
- SSM Health St Clare Hospital - BarabooBaraboo, WI · Acute Care Hospital · CCN 520057
- SSM Health St Mary's Hospital - MadisonMadison, WI · Acute Care Hospital · CCN 520083
- The Monroe ClinicMonroe, WI · Acute Care Hospital · CCN 520028
Practice locations
Addresses where Derek T. Tessman is enrolled with Medicare (CMS data updated 2026-10-02).
- 700 S Park StMadison, WI 53715 (608) 251‑6100
Group practices
Medicare enrollment lists Derek T. Tessman as a member of this group (CMS data updated 2026-10-02).
- Dean Health Systems Inc1,159 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Madison
Clinicians with the same Medicare primary specialty in Madison, WI — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Des Moines University Of Osteopathic Medicine And Health Sciences |
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1275023988 |
| 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