Catherine Leigh Gaffney, DO
NPI 1831143155ActiveIndividual· Internal Medicine· Tulsa, OK
Internal Medicine (DO) in Tulsa, Oklahoma, trained at Oklahoma State University College of Osteopathic Medicine (class of 1996). Their prescriptions cost Medicare Part D more than their services did: $883,755 for 5,233 claims, against $57,151 paid for services in 2024. Novo Nordisk Inc was the largest of 17 companies reporting payments in 2025, $1,941 in all, mostly food and beverage.
Overview
| NPI | 1831143155 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | May 20, 2006 |
| Last updated in NPPES | Feb 19, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 4159 | 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 - Internal Medicine (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 199 |
|---|---|
| Services billed | 875 across 33 procedure codes |
| Paid by Medicare | $57,151 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,233 · 11,078 30-day fills |
|---|---|
| Patients | 264 |
| Total drug cost | $883,755 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Oklahoma State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Ahs Oklahoma Physician Group LLCTulsa, OK · 313 clinicians
Hospital affiliations
- Ascension St John Medical CenterTulsa, OK
- Bailey Medical Center, LLCOwasso, OK
- Hillcrest Hospital SouthTulsa, OK
- Hillcrest Medical CenterTulsa, OK
- Saint Francis Hospital, IncTulsa, OK
Other facilities
- Enhabit Home Health of Northeast OklahomaHome health agency · Broken Arrow, OK
Industry payments (Open Payments)
- 2025$1,941 · 97 payments from 17 companies
- 2024$1,755 · 88 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $506.63 | 18 |
| Astrazeneca Pharmaceuticals LP | $208.67 | 12 |
| Otsuka America Pharmaceutical, Inc. | $204.67 | 13 |
| Lilly USA, LLC | $179.92 | 11 |
| Pfizer Inc. | $177.93 | 9 |
What the 2025 payments were for
- Food and Beverage$1,812 · 93 payments
- Education$129.08 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 373 internal medicine physicians in Tulsa · All internal medicine physicians in Oklahoma