Douglas Tran, MD
NPI 1144270976ActiveIndividual· Internal Medicine· Naperville, IL
Internal Medicine (MD) with Endeavor Health Medical Group, practicing in Naperville, Illinois. Their prescriptions cost Medicare Part D more than their services did: $630,830 for 10,329 claims, against $169,910 paid for services in 2024. Novo Nordisk Inc was the largest of 4 companies reporting payments in 2025, $306.74 in all, mostly food and beverage. Lists Copley Memorial Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1144270976 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 11, 2006 |
| Last updated in NPPES | Jan 4, 2021 |
| Certified by provider | Jan 4, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036114763 | IL |
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 - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 622 |
|---|---|
| Services billed | 1,758 across 29 procedure codes |
| Paid by Medicare | $169,910 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,329 · 25,388 30-day fills |
|---|---|
| Patients | 1,030 |
| Total drug cost | $630,830 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2001 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Endeavor Health Medical GroupEvanston, IL · 3,350 clinicians
Hospital affiliations
- Copley Memorial HospitalAurora, IL
- Edward HospitalNaperville, IL
- Elmhurst Memorial HospitalElmhurst, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Swedish HospitalChicago, IL
Other facilities
- Amma Home Health Care, IncHome health agency · Naperville, IL
- Auxilium Healthcare Services, IncHome health agency · South Barrington, IL
- Dmj Home Health Services, IncHome health agency · Aurora, IL
- Newsome Home Health Care & Purpose Care of Illinois - JolietHome health agency · Joliet, IL
- Residential Home HealthHome health agency · Lisle, IL
Industry payments (Open Payments)
- 2025$306.74 · 14 payments from 4 companies
- 2024$140.20 · 7 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $152.03 | 5 |
| Lilly USA, LLC | $111.48 | 6 |
| Pfizer Inc. | $28.57 | 2 |
| E.R. Squibb & Sons, L.L.C. | $14.66 | 1 |
What the 2025 payments were for
- Food and Beverage$306.74 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 114 internal medicine physicians in Naperville · All internal medicine physicians in Illinois