DR. GREGORY GEORGE GENSHEIMER (M.D.) – Ophthalmology Physician, NPI 1740202621
Ophthalmology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
71 OPHTHALMOLOGY in ME
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Provider Addresses for DR. GREGORY GEORGE GENSHEIMER (M.D.)
8, Mason Street, Brunswick, Cumberland County, Maine, 04011, United States
BRUNSWICK, ME 040111514
Phone: (207) 729-7971
Fax: (207) 725-7910
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-06-23
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050623000437 | I | Ophthalmology | ME | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 143 | 96 | $0 |
| 92014 | Established patient complete exam of visual system | 132 | 131 | $0 |
| 92133 | Imaging of optic nerve | 122 | 83 | $0 |
| 92134 | Imaging of retina | 42 | 38 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 41 | 33 | $0 |
Insurance plans in this area (ZIP 04011)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | PA | |
| - | ME | |
| - | ME | |
| - | ME | |
| - | ME | |
| Family Practice, Hospice/Palliative Care | ME | |
| Pediatric Medicine, Endocrinology | MA | |
| - | ME | |
| Family Practice | ME | |
| Nurse Practitioner | ME |
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