Stephen R. McMahon, MD
NPI 1225098957ActiveIndividual· Internal Medicine· Kaufman, TX
Internal Medicine (MD) in Kaufman, Texas, trained at University of Texas Southwestern Medical School at Dallas (class of 1976). 165 Medicare patients in 2024, $30,344 paid; nearly all of their 366 Part D prescriptions were generic (90%). Regeneron Healthcare Solutions, Inc. reported $91.50 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1225098957 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 25, 2006 |
| Last updated in NPPES | Dec 23, 2020 |
| Certified by provider | Dec 23, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | E6514 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 165 |
|---|---|
| Services billed | 429 across 9 procedure codes |
| Paid by Medicare | $30,344 |
Part D prescriptions in 2024
| Prescriptions (claims) | 366 · 407 30-day fills |
|---|---|
| Patients | 161 |
| Total drug cost | $17,548 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | University of Texas Southwestern Medical School at Dallas |
|---|---|
| Graduation year | 1976 |
| Medicare specialty | Internal Medicine |
Medical group
- Texas Health Physicians GroupFort Worth, TX · 1,365 clinicians
Hospital affiliation
- Texas Health Presbyterian Hospital KaufmanKaufman, TX
Industry payments (Open Payments)
- 2025$91.50 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | $91.50 | 3 |
What the 2025 payments were for
- Food and Beverage$91.50 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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