Stuart M. Sprague, DO
NPI 1114947124ActiveIndividual· Internal Medicine, Nephrology· Evanston, IL
Internal Medicine, Nephrology (DO) in Evanston, Illinois, trained at Michigan State University College of Osteopathic Medicine (class of 1982). Their prescriptions cost Medicare Part D more than their services did: $504,492 for 1,666 claims, against $144,136 paid for services in 2024. Ardelyx, Inc. was the largest of 16 companies reporting payments in 2025, $24,686 in all, mostly speaking and faculty fees.
Overview
| NPI | 1114947124 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Jul 20, 2006 |
| Last updated in NPPES | Apr 1, 2021 |
| Certified by provider | Apr 1, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 036066785 | IL |
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 (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 655 |
|---|---|
| Services billed | 1,480 across 25 procedure codes |
| Paid by Medicare | $144,136 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,666 · 4,298 30-day fills |
|---|---|
| Patients | 340 |
| Total drug cost | $504,492 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Michigan State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Endeavor Health Medical GroupEvanston, IL · 3,350 clinicians
Hospital affiliations
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Northwestern Memorial HospitalChicago, IL
- Swedish HospitalChicago, IL
Other facilities
- Concerto DialysisDialysis facility · Lincolnwood, IL
- Davita Edens Home DialysisDialysis facility · Skokie, IL
- Davita Glen DialysisDialysis facility · Glenview, IL
- Fmc - Midamerica EvanstonDialysis facility · Evanston, IL
Industry payments (Open Payments)
- 2025$24,686 · 47 payments from 16 companies
- 2024$50,090 · 92 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $16,461 | 17 |
| Ascendis Pharma Endocrinology Inc | $3,641 | 4 |
| Opko Pharmaceuticals, LLC | $1,920 | 1 |
| Kyowa Kirin, Inc. | $1,840 | 2 |
| Novartis Pharmaceuticals Corporation | $148.42 | 2 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$18,838 · 11 payments
- Consulting Fee$4,269 · 2 payments
- Food and Beverage$1,413 · 28 payments
- Travel and Lodging$160.34 · 4 payments
- Education$5.56 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Nephrology providers in Evanston
- 1932360864
- 1821237017
- 1609193028
- 1538782636
- 1932122322
- 1043269210
- 1548280605
- 1518988260
- 1255643987
- 1225112741