Gregory S. Doren, M.D.
NPI 1851411847ActiveIndividual· Ophthalmology· Chicago, IL
Ophthalmology (M.D.) in Chicago, Illinois, trained at University of Michigan Medical School (class of 1985). In 2024 Medicare paid $207,861 for 577 patients, and Part D covered 2,069 of their prescriptions, 57% of them generic.
Overview
| NPI | 1851411847 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 31, 2007 |
| Last updated in NPPES | Dec 29, 2021 |
| Certified by provider | Dec 29, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 036079629 | 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 - Ophthalmology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 577 |
|---|---|
| Services billed | 2,891 across 29 procedure codes |
| Paid by Medicare | $207,861 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,069 · 3,830 30-day fills |
|---|---|
| Patients | 448 |
| Total drug cost | $113,138 |
| Generic share | 57% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Ophthalmology |
Hospital affiliations
- Advocate Illinois Masonic Medical CenterChicago, IL
- Presence Saint Joseph Hospital - ChicagoChicago, IL
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 375 ophthalmologists in Chicago · All ophthalmologists in Illinois