Ronald N. Gaster, MD
NPI 1306940325ActiveIndividual· Ophthalmology· Long Beach, CA
Ophthalmology (MD) in Long Beach, California, trained at University of California, Geffen School of Medicine (class of 1973). Their prescriptions cost Medicare Part D more than their services did: $128,997 for 395 claims, against $65,936 paid for services in 2024. Glaukos Corporation was the largest of 4 companies reporting payments in 2025, $328.40 in all, mostly food and beverage.
Overview
| NPI | 1306940325 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 11, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | A026039 | 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) | Enrolled Practitioner - Ophthalmology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 250 |
|---|---|
| Services billed | 1,115 across 22 procedure codes |
| Paid by Medicare | $65,936 |
Part D prescriptions in 2024
| Prescriptions (claims) | 395 · 622 30-day fills |
|---|---|
| Patients | 93 |
| Total drug cost | $128,997 |
| Generic share | 35% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1973 |
| Medicare specialty | Ophthalmology |
Medical group
- Orange Coast Eye Center IncFountain Valley, CA · 5 clinicians
Industry payments (Open Payments)
- 2025$328.40 · 6 payments from 4 companies
- 2024$516.17 · 15 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaukos Corporation | $231.59 | 2 |
| Dompe US, Inc. | $48.47 | 2 |
| Sun Pharmaceutical Industries Inc. | $26.71 | 1 |
| Alcon Vision LLC | $21.63 | 1 |
What the 2025 payments were for
- Food and Beverage$328.40 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 68 ophthalmologists in Long Beach · All ophthalmologists in California