Charles Soonkyu Ahn, MD
NPI 1942260278ActiveIndividual· Ophthalmology· Naperville, IL
Ophthalmology (MD) in Naperville, Illinois, trained at University of Michigan Medical School (class of 1993). In 2024 Medicare paid $275,330 for 725 patients, and Part D covered 2,417 of their prescriptions, 45% of them generic. Alcon Vision LLC was the largest of 2 companies reporting payments in 2025, $110.98 in all, mostly food and beverage.
Overview
| NPI | 1942260278 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 23, 2006 |
| Last updated in NPPES | Aug 3, 2023 |
| Certified by provider | Aug 3, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 36098124 | 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 | 725 |
|---|---|
| Services billed | 1,652 across 42 procedure codes |
| Paid by Medicare | $275,330 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,417 · 2,953 30-day fills |
|---|---|
| Patients | 688 |
| Total drug cost | $93,279 |
| Generic share | 45% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Ophthalmology |
Medical group
- Dupage Medical Group LtdWinfield, IL · 1,322 clinicians
Hospital affiliations
- Advocate Good Samaritan HospitalDowners Grove, IL
- Edward HospitalNaperville, IL
Industry payments (Open Payments)
- 2025$110.98 · 3 payments from 2 companies
- 2024$42.37 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $68.06 | 1 |
| Biotissue Holdings Inc. | $42.92 | 2 |
What the 2025 payments were for
- Food and Beverage$110.98 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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