Stephen John Chalmers, M.D.
NPI 1134166143ActiveIndividual· Internal Medicine, Nephrology· Arlington, TX
Internal Medicine, Nephrology (M.D.) in Arlington, Texas, trained at University of Cincinnati College of Medicine (class of 2002). In 2024 Medicare paid $138,777 for 328 patients, and Part D covered 1,057 of their prescriptions, 78% of them generic. Amgen Inc. was the largest of 13 companies reporting payments in 2025, $521.65 in all, mostly food and beverage.
Overview
| NPI | 1134166143 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 31, 2006 |
| Last updated in NPPES | Aug 18, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | M9916 | 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 - Nephrology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 328 |
|---|---|
| Services billed | 1,309 across 18 procedure codes |
| Paid by Medicare | $138,777 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,057 · 2,325 30-day fills |
|---|---|
| Patients | 180 |
| Total drug cost | $156,058 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | University of Cincinnati College of Medicine |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Nephrology |
Medical group
- North Texas Nephrology Associates PAArlington, TX · 4 clinicians
Hospital affiliations
- Baylor Scott & White Medical Center GrapevineGrapevine, TX
- Medical City ArlingtonArlington, TX
- Texas Health Arlington Memorial HospitalArlington, TX
- Texas Health Harris Methodist Hurst-Euless-BedfordBedford, TX
- Usmd Hospital at Arlington L PArlington, TX
Other facilities
- Ameri-Tech Kidney Center-Arlington LLCDialysis facility · Arlington, TX
- Ameri-Tech Kidney Center-Bedford LLCDialysis facility · Bedford, TX
Industry payments (Open Payments)
- 2025$521.65 · 23 payments from 13 companies
- 2024$684.02 · 28 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $114.24 | 5 |
| Otsuka America Pharmaceutical, Inc. | $63.55 | 3 |
| Akebia Therapeutics Inc | $51.86 | 2 |
| Bayer Healthcare Pharmaceuticals Inc. | $51.46 | 2 |
| Calliditas Therapeutics US Inc. | $41.99 | 2 |
What the 2025 payments were for
- Food and Beverage$521.65 · 23 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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