Todd A. Mahr, MD
NPI 1659374411ActiveIndividual· Pediatrics, Pediatric Allergy/Immunology· La Crosse, WI
Pediatrics, Pediatric Allergy/Immunology (MD) in La Crosse, Wisconsin, trained at University of Wisconsin School of Medicine (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $169,155 for 332 claims, against $2,842 paid for services in 2024. Genzyme Corporation was the largest of 5 companies reporting payments in 2025, $87,094 in all, mostly consulting fees.
Overview
| NPI | 1659374411 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 24, 2005 |
| Last updated in NPPES | Oct 8, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Pediatrics, Pediatric Allergy/Immunology Primary | 2080P0201X | 26831 | WI |
| Pediatrics, Pediatric Allergy/Immunology | 2080P0201X | 29460 | IA |
| Pediatrics, Pediatric Allergy/Immunology | 2080P0201X | 37440 | MN |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Allergy/Immunology (IA); Practitioner - Allergy/Immunology (MN); Practitioner - Allergy/Immunology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 33 |
|---|---|
| Services billed | 57 across 8 procedure codes |
| Paid by Medicare | $2,842 |
Part D prescriptions in 2024
| Prescriptions (claims) | 332 · 467 30-day fills |
|---|---|
| Patients | 33 |
| Total drug cost | $169,155 |
| Generic share | 55% of claims |
Education and affiliations
| Medical school | University of Wisconsin School of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Allergy/Immunology |
Medical groups
- Gundersen Lutheran Medical Center IncLa Crosse, WI · 895 clinicians
- Gundersen Clinic LtdOnalaska, WI · 418 clinicians
- Gundersen Regional Clinics, LLCDecorah, IA · 53 clinicians
Hospital affiliation
- Gundersen Lutheran Medical CenterLa Crosse, WI
Industry payments (Open Payments)
- 2025$87,094 · 66 payments from 5 companies
- 2024$90,530 · 67 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $43,754 | 25 |
| Regeneron Healthcare Solutions, Inc. | $34,079 | 33 |
| Kaleo, Inc. | $9,050 | 6 |
| Astrazeneca Pharmaceuticals LP | $125.00 | 1 |
| Glaxosmithkline, LLC. | $85.91 | 1 |
What the 2025 payments were for
- Consulting Fee$49,426 · 7 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$26,904 · 5 payments
- Travel and Lodging$9,103 · 33 payments
- Food and Beverage$1,661 · 21 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Pediatrics, Pediatric Allergy/Immunology providers in La Crosse
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- 1780959924
All Pediatrics, Pediatric Allergy/Immunology providers in Wisconsin →