Greg A. Butterworth, O. D.
NPI 1336116979ActiveIndividual· Optometrist· Havre De Grace, MD
Optometrist (O. D.) in Havre De Grace, Maryland, trained at Pennsylvania College of Optometry (class of 1999). In 2024 Medicare paid $69,316 for 561 patients, and Part D covered 362 of their prescriptions, 57% of them generic. Tarsus Pharmaceuticals, Inc. was the largest of 5 companies reporting payments in 2025, $786.76 in all, mostly food and beverage.
Overview
| NPI | 1336116979 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | O. D. |
| Sole proprietor | No |
| NPI issued | Mar 2, 2006 |
| Last updated in NPPES | Nov 2, 2021 |
| Certified by provider | Nov 2, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | TA1619 | MD |
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 - Optometry (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 561 |
|---|---|
| Services billed | 1,306 across 22 procedure codes |
| Paid by Medicare | $69,316 |
Part D prescriptions in 2024
| Prescriptions (claims) | 362 · 532 30-day fills |
|---|---|
| Patients | 129 |
| Total drug cost | $69,431 |
| Generic share | 57% of claims |
Education and affiliations
| Medical school | Pennsylvania College of Optometry |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Optometry |
Medical group
- Katzen Medical Associates PCLutherville, MD · 23 clinicians
Industry payments (Open Payments)
- 2025$786.76 · 26 payments from 5 companies
- 2024$584.01 · 20 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Tarsus Pharmaceuticals, Inc. | $260.08 | 6 |
| Bausch & Lomb Americas Inc. | $192.95 | 5 |
| Sun Pharmaceutical Industries Inc. | $158.91 | 7 |
| Alcon Vision LLC | $125.79 | 6 |
| Coopervision Inc. | $49.03 | 2 |
What the 2025 payments were for
- Food and Beverage$786.76 · 26 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 25 optometrists in Havre De Grace · All optometrists in Maryland