Nathan C. Hamaker, MD
NPI 1104852292ActiveIndividual· Ophthalmology· Lancaster, CA
Ophthalmology (MD) in Lancaster, California, licensed in CA, with an NPI issued in June 2006. In 2024 Medicare paid $132,232 for 794 patients, and Part D covered 2,701 of their prescriptions, 85% of them generic. Bausch & Lomb Americas Inc. reported $19.99 in payments in 2024, mostly food and beverage.
Overview
| NPI | 1104852292 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 23, 2006 |
| Last updated in NPPES | Jun 29, 2026 |
| Certified by provider | Jun 29, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | C205778 | 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 | 794 |
|---|---|
| Services billed | 1,709 across 29 procedure codes |
| Paid by Medicare | $132,232 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,701 · 4,549 30-day fills |
|---|---|
| Patients | 562 |
| Total drug cost | $125,288 |
| Generic share | 85% of claims |
Industry payments (Open Payments)
- 2024$19.99 · 1 payment from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Bausch & Lomb Americas Inc. | $19.99 | 1 |
What the 2024 payments were for
- Food and Beverage$19.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Ophthalmology providers in Lancaster
- 1437298759
- 1780094573
- 1447214390
- 1902892441
- 1932376159
- 1679916886
- 1982929105
- 1164476248
- 1164616686