Thomas Mark Johnson, M.D.
NPI 1801848486ActiveIndividual· Internal Medicine, Cardiovascular Disease· Dubuque, IA
Internal Medicine, Cardiovascular Disease (M.D.) in Dubuque, Iowa, trained at University of Iowa, Rj & L Carver College of Medicine (class of 1974). Their prescriptions cost Medicare Part D more than their services did: $484,158 for 2,993 claims, against $52,622 paid for services in 2024. Salix Pharmaceuticals, A Division of Bausch Health US, LLC reported $20.09 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1801848486 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 16, 2006 |
| Last updated in NPPES | Nov 25, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 21505 | IA |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | 29644 | 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 - Cardiovascular Disease (Cardiology) (IA); Practitioner - Cardiovascular Disease (Cardiology) (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 371 |
|---|---|
| Services billed | 1,425 across 81 procedure codes |
| Paid by Medicare | $52,622 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,993 · 6,630 30-day fills |
|---|---|
| Patients | 438 |
| Total drug cost | $484,158 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | University of Iowa, Rj & L Carver College of Medicine |
|---|---|
| Graduation year | 1974 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical group
- Medical Associates Clinic P CDubuque, IA · 233 clinicians
Hospital affiliation
- Mercyone Dubuque Medical CenterDubuque, IA
Industry payments (Open Payments)
- 2025$20.09 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $20.09 | 1 |
What the 2025 payments were for
- Food and Beverage$20.09 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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