Dennis Barry Weiserbs, MD
NPI 1528004942ActiveIndividual· Internal Medicine, Gastroenterology· Roanoke, VA
Internal Medicine, Gastroenterology (MD) in Roanoke, Virginia, trained at Perelman School of Med at the University of Pennsylvania (class of 1978). Their prescriptions cost Medicare Part D more than their services did: $65,315 for 580 claims, against $28,592 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 2 companies reporting payments in 2025, $182.92 in all, mostly food and beverage.
Overview
| NPI | 1528004942 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 22, 2006 |
| Last updated in NPPES | Jan 25, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 0101031465 | VA |
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 (VA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 203 |
|---|---|
| Services billed | 310 across 15 procedure codes |
| Paid by Medicare | $28,592 |
Part D prescriptions in 2024
| Prescriptions (claims) | 580 · 1,121 30-day fills |
|---|---|
| Patients | 134 |
| Total drug cost | $65,315 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Perelman School of Med at the University of Pennsylvania |
|---|---|
| Graduation year | 1978 |
| Medicare specialty | Gastroenterology |
Medical group
- Gastroenterology Consultants ofRoanoke, VA · 17 clinicians
Hospital affiliation
- Lewisgale Medical CenterSalem, VA
Industry payments (Open Payments)
- 2025$182.92 · 3 payments from 2 companies
- 2024$79.66 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $136.36 | 1 |
| Abbvie Inc. | $46.56 | 2 |
What the 2025 payments were for
- Food and Beverage$182.92 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 28 gastroenterologists in Roanoke · All gastroenterologists in Virginia