Gregory George Gensheimer, M.D.
NPI 1740202621ActiveIndividual· Ophthalmology· Brunswick, ME
Ophthalmology (M.D.) in Brunswick, Maine, trained at University of Rochester School of Medicine and Dentistry (class of 1977). Their prescriptions cost Medicare Part D more than their services did: $119,688 for 757 claims, against $19,614 paid for services in 2024.
Overview
| NPI | 1740202621 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 23, 2006 |
| Last updated in NPPES | Feb 8, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 10700 | ME |
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 (ME) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 252 |
|---|---|
| Services billed | 548 across 13 procedure codes |
| Paid by Medicare | $19,614 |
Part D prescriptions in 2024
| Prescriptions (claims) | 757 · 1,755 30-day fills |
|---|---|
| Patients | 149 |
| Total drug cost | $119,688 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | University of Rochester School of Medicine and Dentistry |
|---|---|
| Graduation year | 1977 |
| Medicare specialty | Ophthalmology |
Medical group
- MainehealthPortland, ME · 2,633 clinicians
Hospital affiliation
- Mainehealth Mid Coast HospitalBrunswick, ME
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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