William M. Tierney, MD
NPI 1255300513ActiveIndividual· Internal Medicine, Gastroenterology· Oklahoma City, OK
Internal Medicine, Gastroenterology (MD) in Oklahoma City, Oklahoma, trained at Yale University School of Medicine (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $109,049 for 159 claims, against $43,088 paid for services in 2024. Boston Scientific Corporation was the largest of 2 companies reporting payments in 2025, $49.90 in all, mostly food and beverage.
Overview
| NPI | 1255300513 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 17, 2006 |
| Last updated in NPPES | Jan 18, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 20307 | OK |
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 (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 239 |
|---|---|
| Services billed | 432 across 51 procedure codes |
| Paid by Medicare | $43,088 |
Part D prescriptions in 2024
| Prescriptions (claims) | 159 · 263 30-day fills |
|---|---|
| Patients | 73 |
| Total drug cost | $109,049 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Yale University School of Medicine |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Ou Health Partners IncOklahoma City, OK · 1,184 clinicians
Hospital affiliation
- O U Medical CenterOklahoma City, OK
Industry payments (Open Payments)
- 2025$49.90 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boston Scientific Corporation | $32.02 | 1 |
| Olympus America Inc. | $17.88 | 1 |
What the 2025 payments were for
- Food and Beverage$49.90 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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