N Thomas Casper, MD
NPI 1003883786ActiveIndividual· Internal Medicine· Madison, WI
Internal Medicine (MD) in Madison, Wisconsin, trained at University of Wisconsin School of Medicine (class of 1991). Their prescriptions cost Medicare Part D more than their services did: $960,264 for 8,720 claims, against $108,622 paid for services in 2024. Amgen Inc. reported $87.14 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1003883786 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 2, 2006 |
| Last updated in NPPES | Feb 7, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 33370 | WI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 457 |
|---|---|
| Services billed | 1,483 across 16 procedure codes |
| Paid by Medicare | $108,622 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,720 · 20,144 30-day fills |
|---|---|
| Patients | 609 |
| Total drug cost | $960,264 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | University of Wisconsin School of Medicine |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Meriter Hospital IncMadison, WI · 122 clinicians
Hospital affiliations
- Stoughton HospitalStoughton, WI
- Unitypoint Health - MeriterMadison, WI
- University of Wi Hospitals & Clinics AuthorityMadison, WI
Other facilities
- Aveanna Home HealthHome health agency · Madison, WI
- Commonheart Home HealthHome health agency · Waukesha, WI
- Uw Health Care DirectHome health agency · Middleton, WI
- Agrace HospicecareHospice · Madison, WI
- Hebron OaksNursing home · Madison, WI
Industry payments (Open Payments)
- 2025$87.14 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $87.14 | 1 |
What the 2025 payments were for
- Food and Beverage$87.14 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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