Sean Eric McMillan, M.D.
NPI 1558353821ActiveIndividual· Internal Medicine, Rheumatology· Twin Falls, ID
Internal Medicine, Rheumatology (M.D.) in Twin Falls, Idaho, trained at University of Florida College of Medicine (class of 1999). Their prescriptions cost Medicare Part D more than their services did: $2,115,040 for 2,659 claims, against $36,477 paid for services in 2024. Amgen Inc. was the largest of 7 companies reporting payments in 2025, $595.07 in all, mostly food and beverage.
Overview
| NPI | 1558353821 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 22, 2005 |
| Last updated in NPPES | Jul 24, 2025 |
| Certified by provider | Jul 24, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | 5891032-1205 | UT |
| Internal Medicine, Rheumatology | 207RR0500X | 3571655 | ID |
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 - Rheumatology (ID); Practitioner - Rheumatology (UT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 219 |
|---|---|
| Services billed | 827 across 12 procedure codes |
| Paid by Medicare | $36,477 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,659 · 5,586 30-day fills |
|---|---|
| Patients | 288 |
| Total drug cost | $2,115,040 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of Florida College of Medicine |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Rheumatology |
Medical group
- St Lukes Clinic LLCTwin Falls, ID · 316 clinicians
Hospital affiliations
- St Luke's JeromeJerome, ID
- St Luke's Regional Medical CenterBoise, ID
- St Luke's Wood River Medical CenterKetchum, ID
- St Lukes Magic Valley Medical CenterTwin Falls, ID
- University of Utah Hospital and ClinicsSalt Lake City, UT
Industry payments (Open Payments)
- 2025$595.07 · 13 payments from 7 companies
- 2024$93.28 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $178.36 | 4 |
| Abbvie Inc. | $154.63 | 4 |
| Eclipse Technology Solutions Inc. | $142.47 | 1 |
| Celgene Corporation | $43.03 | 1 |
| Ucb, Inc. | $42.82 | 1 |
What the 2025 payments were for
- Food and Beverage$595.07 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Rheumatology providers in Twin Falls
- 1538108394
- 1982641882
- 1902840317