Todd A. Mahr, MD
Listed as a pediatric allergist, with 5 practice addresses in Winona, Minnesota, and 3 other cities.
Practice locations 5
Gundersen Lutheran Medical Center Inc
1122 W Hwy 61
Winona, MN 55987Gundersen Clinic Ltd
1600 Main St
Onalaska, WI 54650Gundersen Regional Clinics, LLC
1830 State Hwy 9, Suite 100
Decorah, IA 52101Gundersen Clinic Ltd
226 2nd St N
Lacrescent, MN 55947Gundersen Clinic Ltd
3111 Gundersen Dr
Onalaska, WI 54650
From the records
- Specialty
- Pediatric allergist
- Records
- Medicare records: allergy/immunology (October 2026).
- Medicare
- Accepts the Medicare-approved amount as payment in full (Medicare assignment), according to CMS’s file. This applies to Original Medicare; Medicare Advantage plans have their own networks. What assignment means
- Medical school
- University of Wisconsin School of Medicine, graduated 1984 (Medicare records)
- Registry record
- Last updated October 2013
- NPI
- 1659374411 (national provider registry)
A listing isn’t a check of a license or board certification, and it doesn’t tell you whether a doctor is taking new patients or accepts your insurance. Call the practice. How we list doctorsChecking your insurance
Is this your listing?
If you’re this doctor or work at their practice, claim the listing to add details such as languages, a website and a booking link. It’s free, and it never changes where a doctor appears in our lists.