William Henry Wismer, DO
NPI 1346292406ActiveIndividual· Internal Medicine, Gastroenterology· Erie, PA
Internal Medicine, Gastroenterology (DO) in Erie, Pennsylvania, trained at Lake Erie College of Osteopathic Medicine, Erie (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $1,268,539 for 802 claims, against $41,090 paid for services in 2024. Janssen Biotech, Inc. was the largest of 15 companies reporting payments in 2025, $3,140 in all, mostly food and beverage.
Overview
| NPI | 1346292406 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | May 17, 2006 |
| Last updated in NPPES | May 4, 2023 |
| Certified by provider | May 4, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | OS-011918 | PA |
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 (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 185 |
|---|---|
| Services billed | 367 across 18 procedure codes |
| Paid by Medicare | $41,090 |
Part D prescriptions in 2024
| Prescriptions (claims) | 802 · 1,312 30-day fills |
|---|---|
| Patients | 172 |
| Total drug cost | $1,268,539 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Lake Erie College of Osteopathic Medicine, Erie |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Gastroenterology |
Medical groups
- Warren General HospitalEugene, OR · 106 clinicians
- Corry Memorial Hospital AssociationUnion City, PA · 30 clinicians
- Medical Associates of ErieErie, PA · 25 clinicians
Hospital affiliations
- Lecom Health Corry Memorial HospitalCorry, PA
- Lecom Medical Center and Behavioral Health PavErie, PA
- Meadville Medical CenterMeadville, PA
- Warren General HospitalWarren, PA
Industry payments (Open Payments)
- 2025$3,140 · 124 payments from 15 companies
- 2024$2,526 · 119 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $1,075 | 33 |
| Abbvie Inc. | $860.64 | 38 |
| Gilead Sciences, Inc. | $212.70 | 8 |
| Ardelyx, Inc. | $188.77 | 5 |
| Pfizer Inc. | $168.34 | 9 |
What the 2025 payments were for
- Food and Beverage$3,140 · 124 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 21 gastroenterologists in Erie · All gastroenterologists in Pennsylvania