Nikos George Christopoulos, MD
NPI 1881708444ActiveIndividual· Internal Medicine, Gastroenterology· Arlington Heights, IL
Internal Medicine, Gastroenterology (MD) with Endeavor Health Medical Group, practicing in Arlington Heights, Illinois. Their prescriptions cost Medicare Part D more than their services did: $551,400 for 1,557 claims, against $125,962 paid for services in 2024. Abbvie Inc. was the largest of 13 companies reporting payments in 2025, $841.43 in all, mostly food and beverage. Lists Loyola University Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1881708444 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Aug 19, 2006 |
| Last updated in NPPES | Apr 28, 2021 |
| Certified by provider | Apr 28, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036-105997 | 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 - Gastroenterology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 588 |
|---|---|
| Services billed | 1,064 across 40 procedure codes |
| Paid by Medicare | $125,962 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,557 · 3,260 30-day fills |
|---|---|
| Patients | 678 |
| Total drug cost | $551,400 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Endeavor Health Medical GroupEvanston, IL · 3,350 clinicians
Hospital affiliations
- Loyola University Medical CenterMaywood, IL
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Northwest Community Hospital 1Arlington Heights, IL
Industry payments (Open Payments)
- 2025$841.43 · 38 payments from 13 companies
- 2024$917.98 · 35 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $399.43 | 21 |
| Takeda Pharmaceuticals U.S.A., Inc. | $111.62 | 4 |
| Pfizer Inc. | $64.65 | 3 |
| Janssen Biotech, Inc. | $43.37 | 1 |
| Genzyme Corporation | $38.04 | 1 |
What the 2025 payments were for
- Food and Beverage$841.43 · 38 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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