Constantine Geor Delis, DO
NPI 1003892043ActiveIndividual· Internal Medicine, Nephrology· Melrose Park, IL
Internal Medicine, Nephrology (DO) in Melrose Park, Illinois, trained at Chicago College of Osteopathy (class of 1993). Their prescriptions cost Medicare Part D more than their services did: $289,135 for 572 claims, against $177,071 paid for services in 2024. Fresenius USA Marketing, Inc. was the largest of 2 companies reporting payments in 2025, $121.44 in all, mostly food and beverage.
Overview
| NPI | 1003892043 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Dec 21, 2005 |
| Last updated in NPPES | Jul 28, 2025 |
| Certified by provider | Jul 28, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 036092711 | 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 | 234 |
|---|---|
| Services billed | 1,708 across 22 procedure codes |
| Paid by Medicare | $177,071 |
Part D prescriptions in 2024
| Prescriptions (claims) | 572 · 1,331 30-day fills |
|---|---|
| Patients | 113 |
| Total drug cost | $289,135 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Chicago College of Osteopathy |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical group
- Associates in Nephrology SCChicago, IL · 52 clinicians
Hospital affiliations
- Advocate Good Samaritan HospitalDowners Grove, IL
- Community First Medical CenterChicago, IL
- Loyola Gottlieb Memorial HospitalMelrose Park, IL
- Loyola University Medical CenterMaywood, IL
Other facilities
- Concerto DialysisDialysis facility · Lincolnwood, IL
- Fmc - Neomedica - Melrose ParkDialysis facility · Melrose Park, IL
- Fmc - North Avenue Dialysis CenterDialysis facility · Melrose Park, IL
- Fmc - River Forest DialysisDialysis facility · River Forest, IL
Industry payments (Open Payments)
- 2025$121.44 · 5 payments from 2 companies
- 2024$317.18 · 9 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Fresenius USA Marketing, Inc. | $94.24 | 4 |
| Amgen Inc. | $27.20 | 1 |
What the 2025 payments were for
- Food and Beverage$121.44 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Nephrology providers in Melrose Park
- 1700245982
- 1720058639
- 1922005792
- 1346455185
- 1194722934
- 1275568578
- 1235162637
- 1316566698
- 1770563009