Regan Michael Seipp, M.D.
NPI 1306256284ActiveIndividual· Internal Medicine, Nephrology· Winfield, IL
Internal Medicine, Nephrology (M.D.) in Winfield, Illinois, trained at Creighton University School of Medicine (class of 2014). Their prescriptions cost Medicare Part D more than their services did: $418,626 for 1,494 claims, against $179,685 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 10 companies reporting payments in 2025, $479.45 in all, mostly food and beverage.
Overview
| NPI | 1306256284 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 1, 2014 |
| Last updated in NPPES | Aug 18, 2023 |
| Certified by provider | Aug 18, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 036148873 | IL |
| Internal Medicine | 207R00000X | 50892 | AZ |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | AZ |
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 - Nephrology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 452 |
|---|---|
| Services billed | 4,543 across 59 procedure codes |
| Paid by Medicare | $179,685 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,494 · 3,741 30-day fills |
|---|---|
| Patients | 299 |
| Total drug cost | $418,626 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Creighton University School of Medicine |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Dupage Medical Group LtdWinfield, IL · 1,322 clinicians
Hospital affiliations
- Advocate Good Samaritan HospitalDowners Grove, IL
- Edward HospitalNaperville, IL
- Elmhurst Memorial HospitalElmhurst, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
Other facilities
- Davita Downers Grove Home TrainingDialysis facility · Downers Grove, IL
- Davita Geneva CrossingsDialysis facility · Carol Stream, IL
Industry payments (Open Payments)
- 2025$479.45 · 31 payments from 10 companies
- 2024$862.15 · 48 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $178.52 | 18 |
| Otsuka America Pharmaceutical, Inc. | $72.16 | 3 |
| Travere Therapeutics, Inc. | $50.70 | 2 |
| Vifor Pharma, Inc. | $45.04 | 2 |
| Novartis Pharmaceuticals Corporation | $27.75 | 1 |
What the 2025 payments were for
- Food and Beverage$479.45 · 31 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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