Clark W. Antonson, MD
NPI 1831182757ActiveIndividual· Internal Medicine, Gastroenterology· Lincoln, NE
Internal Medicine, Gastroenterology (MD) in Lincoln, Nebraska, trained at University of Nebraska College of Medicine (class of 1985). Their prescriptions cost Medicare Part D more than their services did: $585,689 for 1,278 claims, against $262,513 paid for services in 2024. Boston Scientific Corporation was the largest of 11 companies reporting payments in 2025, $585.41 in all, mostly food and beverage.
Overview
| NPI | 1831182757 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 25, 2005 |
| Last updated in NPPES | Jan 27, 2025 |
| Certified by provider | Jan 27, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 17282 | NE |
| Specialist | 174400000X | 17282 | NE |
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 - Gastroenterology (NE) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 625 |
|---|---|
| Services billed | 8,621 across 62 procedure codes |
| Paid by Medicare | $262,513 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,278 · 1,891 30-day fills |
|---|---|
| Patients | 599 |
| Total drug cost | $585,689 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | University of Nebraska College of Medicine |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Gastroenterology |
Medical group
- Gastroenterology Specialties PCLincoln, NE · 51 clinicians
Hospital affiliations
- Beatrice Community Hospital & Health Center, IncBeatrice, NE
- Bryan Medical CenterLincoln, NE
- Chi Health St. ElizabethLincoln, NE
- Jefferson Community Health & LifeFairbury, NE
- The Nebraska Medical CenterOmaha, NE
Industry payments (Open Payments)
- 2025$585.41 · 18 payments from 11 companies
- 2024$1,623 · 24 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boston Scientific Corporation | $127.87 | 1 |
| Genzyme Corporation | $106.77 | 1 |
| Ipsen Biopharmaceuticals, Inc | $98.38 | 2 |
| Abbvie Inc. | $66.99 | 4 |
| Amgen Inc. | $54.61 | 3 |
What the 2025 payments were for
- Food and Beverage$585.41 · 18 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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