Gregory B. McMahill, O.D.
NPI 1366505588ActiveIndividual· Optometrist· Palm Desert, CA
Optometrist (O.D.) in Palm Desert, California, licensed in CA, with an NPI issued in December 2006. Part D covered 63 prescriptions written in 2024, 73% of them generic. Alcon Vision LLC was the largest of 3 companies reporting payments in 2025, $307.61 in all, mostly food and beverage.
Overview
| NPI | 1366505588 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | O.D. |
| Sole proprietor | No |
| NPI issued | Dec 19, 2006 |
| Last updated in NPPES | Oct 30, 2026 |
| Certified by provider | Oct 30, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | OPT 9489 TPA | CA |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 63 · 92 30-day fills |
|---|---|
| Patients | 36 |
| Total drug cost | $5,188 |
| Generic share | 73% of claims |
Industry payments (Open Payments)
- 2025$307.61 · 4 payments from 3 companies
- 2024$639.88 · 7 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $146.20 | 1 |
| Johnson & Johnson Vision Care, Inc. | $131.07 | 1 |
| Coopervision Inc. | $30.34 | 2 |
What the 2025 payments were for
- Food and Beverage$307.61 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 32 optometrists in Palm Desert · All optometrists in California