Michael A. Grassi, MD
NPI 1689666885ActiveIndividual· Ophthalmology· Naperville, IL
Ophthalmology (MD) in Naperville, Illinois, trained at Northwestern University Feinberg Medical School (class of 1999). In 2024 Medicare paid $1,711,539 for 441 patients, and Part D covered 172 of their prescriptions, 78% of them generic.
Overview
| NPI | 1689666885 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 16, 2005 |
| Last updated in NPPES | Mar 10, 2025 |
| Certified by provider | Mar 10, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 036115845 | IL |
| Ophthalmology, Retina Specialist | 207WX0107X | 036115845 | 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 - Ophthalmology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 441 |
|---|---|
| Services billed | 7,990 across 41 procedure codes |
| Paid by Medicare | $1,711,539 |
Part D prescriptions in 2024
| Prescriptions (claims) | 172 · 260 30-day fills |
|---|---|
| Patients | 53 |
| Total drug cost | $6,116 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Ophthalmology |
Hospital affiliation
- Edward HospitalNaperville, 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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