Quick answers
- Where does Mathew Mergenthaler see patients?
- Medicare's clinician data lists 5 practice locations, including Colby, WI, Winona, MN and La Crosse, WI. Call before your visit to confirm the address.
- What is Mathew Mergenthaler's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Mathew Mergenthaler accept Medicare assignment?
- Yes. Medicare's clinician data says Mathew Mergenthaler 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 Mathew Mergenthaler?
- (715) 223-4003, as listed in official Medicare / NPI Registry data.
- What is Mathew Mergenthaler's NPI number?
- 1568874907. 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 Mathew Mergenthaler is enrolled with Medicare (CMS data updated 2026-10-02).
- 120 Dehne Dr, Suite GColby, WI 54421 (715) 223‑4003
- 1459 W Service DrWinona, MN 55987 (507) 452‑6175
- 1607 Losey Blvd SLa Crosse, WI 54601 (608) 459‑1920
- 353 N 8th StMedford, WI 54451 (715) 748‑2020
- 353 N 8th St, PO Box 547Medford, WI 54451
Group practices
Medicare enrollment lists Mathew Mergenthaler as a member of these groups (CMS data updated 2026-10-02).
- Shoptikal LLC189 clinicians in the group
- Healthview Eye Care Center, SC6 clinicians in the group
- Healthview Eye Care Center-Medford SC6 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Colby
Clinicians with the same Medicare primary specialty in Colby, WI — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | Illinois College Of Optometry At Chicago |
| Graduation year | 2014 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1568874907 |
| 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