Darrien Lance Gaston, M.D.
NPI 1023234143ActiveIndividual· Internal Medicine, Gastroenterology· Chicago, IL
Internal Medicine, Gastroenterology (M.D.) in Chicago, Illinois, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1984). In 2024 Medicare paid $32,106 for 126 patients, and Part D covered 193 of their prescriptions, 64% of them generic. Olympus Medical Systems Corporation was the largest of 4 companies reporting payments in 2025, $958.75 in all, mostly consulting fees.
Overview
| NPI | 1023234143 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 17, 2007 |
| Last updated in NPPES | Jan 4, 2022 |
| Certified by provider | Dec 31, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036071497 | 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 | 126 |
|---|---|
| Services billed | 198 across 18 procedure codes |
| Paid by Medicare | $32,106 |
Part D prescriptions in 2024
| Prescriptions (claims) | 193 · 263 30-day fills |
|---|---|
| Patients | 106 |
| Total drug cost | $19,265 |
| Generic share | 64% of claims |
Education and affiliations
| Medical school | University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Hospital affiliations
- Advocate Trinity HospitalChicago, IL
- Osf Little Company of Mary Medical CenterEvergreen Park, IL
Industry payments (Open Payments)
- 2025$958.75 · 5 payments from 4 companies
- 2024$15.31 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Olympus Medical Systems Corporation | $875.00 | 1 |
| Conmed Corporation | $36.51 | 1 |
| Gilead Sciences, Inc. | $32.45 | 2 |
| Novo Nordisk Inc | $14.79 | 1 |
What the 2025 payments were for
- Consulting Fee$875.00 · 1 payment
- Food and Beverage$83.75 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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