David M. McMahon, DO
NPI 1457662249ActiveIndividual· Psychiatry & Neurology, Psychiatry· Green Bay, WI
Psychiatry & Neurology, Psychiatry (DO) in Green Bay, Wisconsin, trained at Des Moines University of Osteopathic Medicine and Health Sciences (class of 2010). Their prescriptions cost Medicare Part D more than their services did: $441,200 for 2,135 claims, against $30,758 paid for services in 2024. Alkermes, Inc. was the largest of 18 companies reporting payments in 2025, $2,095 in all, mostly food and beverage.
Overview
| NPI | 1457662249 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Jun 25, 2010 |
| Last updated in NPPES | Oct 18, 2021 |
| Certified by provider | Oct 18, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | 63216-21 | WI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Psychiatry (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 73 |
|---|---|
| Services billed | 474 across 9 procedure codes |
| Paid by Medicare | $30,758 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,135 · 2,991 30-day fills |
|---|---|
| Patients | 199 |
| Total drug cost | $441,200 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Des Moines University of Osteopathic Medicine and Health Sciences |
|---|---|
| Graduation year | 2010 |
| Medicare specialty | Psychiatry |
| Telehealth | Offers telehealth |
Medical groups
- Rockford Psychiatric Medical Services SCChicago, IL · 160 clinicians
- Affiliated Clinical Services IncWest Bend, WI · 23 clinicians
- Human Services Board Serving North Central Health Care FacilityWausau, WI · 22 clinicians
Industry payments (Open Payments)
- 2025$2,095 · 100 payments from 18 companies
- 2024$1,396 · 61 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alkermes, Inc. | $389.74 | 16 |
| Axsome Therapeutics, Inc. | $330.69 | 23 |
| Abbvie Inc. | $289.96 | 14 |
| Teva Pharmaceuticals USA, Inc. | $261.33 | 4 |
| Lundbeck LLC | $130.30 | 6 |
What the 2025 payments were for
- Food and Beverage$1,869 · 97 payments
- Education$226.73 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 36 psychiatrists in Green Bay · All psychiatrists in Wisconsin