David R. Gwynn, M.D
NPI 1003837766ActiveIndividual· Ophthalmology· Mission Viejo, CA
Ophthalmology (M.D) in Mission Viejo, California, trained at Georgetown University School of Medicine (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $351,625 for 2,163 claims, against $72,465 paid for services in 2024. Bausch & Lomb Americas Inc. was the largest of 7 companies reporting payments in 2025, $1,313 in all, mostly food and beverage.
Overview
| NPI | 1003837766 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | No |
| NPI issued | Jul 21, 2006 |
| Last updated in NPPES | Jan 10, 2020 |
| Certified by provider | Jan 10, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | G86237 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 299 |
|---|---|
| Services billed | 652 across 24 procedure codes |
| Paid by Medicare | $72,465 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,163 · 3,243 30-day fills |
|---|---|
| Patients | 598 |
| Total drug cost | $351,625 |
| Generic share | 50% of claims |
Education and affiliations
| Medical school | Georgetown University School of Medicine |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Ophthalmology |
Medical groups
- Ramin Tayani MD IncSan Clemente, CA · 16 clinicians
- Luis A Chanes M D IncSanta Ana, CA · 7 clinicians
Industry payments (Open Payments)
- 2025$1,313 · 37 payments from 7 companies
- 2024$1,230 · 34 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bausch & Lomb Americas Inc. | $700.74 | 11 |
| Alcon Vision LLC | $266.83 | 15 |
| Optos, Inc. | $93.97 | 1 |
| Abbvie Inc. | $80.54 | 3 |
| Amgen Inc. | $69.35 | 3 |
What the 2025 payments were for
- Food and Beverage$1,219 · 36 payments
- Entertainment$93.97 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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