Brian G B Gaster, OD
NPI 1922099639ActiveIndividual· Optometrist· Washington, PA
Optometrist (OD) in Washington, Pennsylvania, trained at Pennsylvania College of Optometry (class of 1999). Their prescriptions cost Medicare Part D more than their services did: $82,131 for 421 claims, against $20,446 paid for services in 2024. Bausch & Lomb Americas Inc. was the largest of 11 companies reporting payments in 2025, $690.90 in all, mostly food and beverage.
Overview
| NPI | 1922099639 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | OD |
| Sole proprietor | Yes |
| NPI issued | Nov 2, 2005 |
| Last updated in NPPES | Jan 17, 2022 |
| Certified by provider | Jan 17, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | 898 | NV |
| Optometrist | 152W00000X | OEG000418 | PA |
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 - Optometry (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 206 |
|---|---|
| Services billed | 403 across 21 procedure codes |
| Paid by Medicare | $20,446 |
Part D prescriptions in 2024
| Prescriptions (claims) | 421 · 609 30-day fills |
|---|---|
| Patients | 193 |
| Total drug cost | $82,131 |
| Generic share | 47% of claims |
Education and affiliations
| Medical school | Pennsylvania College of Optometry |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Optometry |
Medical group
- Alexander Chang MD PCPittsburgh, PA · 8 clinicians
Industry payments (Open Payments)
- 2025$690.90 · 23 payments from 11 companies
- 2024$1,365 · 63 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bausch & Lomb Americas Inc. | $191.31 | 6 |
| Glaukos Corporation | $124.74 | 1 |
| Alcon Vision LLC | $119.04 | 4 |
| Abbvie Inc. | $75.95 | 5 |
| Regeneron Healthcare Solutions, Inc. | $36.06 | 1 |
What the 2025 payments were for
- Food and Beverage$690.90 · 23 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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