Colin Michael Ridenour, MD
NPI 1457888430ActiveIndividual· Ophthalmology· Warsaw, IN
Ophthalmology (MD) in Warsaw, Indiana, trained at Indiana University School of Medicine (class of 2017). In 2024 Medicare paid $1,366,630 for 1,026 patients, and Part D covered 2,689 of their prescriptions, 78% of them generic. Alcon Vision LLC was the largest of 6 companies reporting payments in 2025, $415.89 in all, mostly food and beverage.
Overview
| NPI | 1457888430 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 22, 2017 |
| Last updated in NPPES | Nov 9, 2021 |
| Certified by provider | Jul 27, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 01085874A | IN |
| Student in an Organized Health Care Education/Training Program | 390200000X | 11019222A | IN |
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 (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,026 |
|---|---|
| Services billed | 12,747 across 52 procedure codes |
| Paid by Medicare | $1,366,630 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,689 · 4,963 30-day fills |
|---|---|
| Patients | 564 |
| Total drug cost | $159,980 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Ophthalmology |
Medical group
- Grossnickle Eye Center IncWarsaw, IN · 12 clinicians
Industry payments (Open Payments)
- 2025$415.89 · 17 payments from 6 companies
- 2024$393.11 · 12 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $167.95 | 6 |
| Abbvie Inc. | $115.33 | 6 |
| Glaukos Corporation | $57.38 | 2 |
| Rxsight Inc | $32.44 | 1 |
| Astellas Pharma US Inc | $22.11 | 1 |
What the 2025 payments were for
- Food and Beverage$383.45 · 16 payments
- Honoraria$32.44 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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