Quick answers
- Where does Victor A. Thonn see patients?
- Medicare's clinician data lists 2 practice locations, including Sparta, WI and Tomah, WI. Call before your visit to confirm the address.
- What is Victor A. Thonn's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Victor A. Thonn accept Medicare assignment?
- Yes. Medicare's clinician data says Victor A. Thonn 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 Victor A. Thonn?
- (608) 269-6731, as listed in official Medicare / NPI Registry data.
- What is Victor A. Thonn's NPI number?
- 1972674299. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Victor A. Thonn is enrolled with Medicare (CMS data updated 2026-10-02).
- 1111 W Wisconsin StSparta, WI 54656 (608) 269‑6731
- 505 Gopher DrTomah, WI 54660 (608) 372‑4111
Group practices
Medicare enrollment lists Victor A. Thonn as a member of this group (CMS data updated 2026-10-02).
- Gundersen Clinic Ltd418 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972674299 |
| 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
- 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