Gregory Persak, M.D.
NPI 1952372245 · Ophthalmology Physician · West Islip, NY
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Persak, M.D. is a Ophthalmology Physician provider in West Islip, NY (NPI 1952372245).
Provider details
- NPI number
- 1952372245
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 150488 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,615 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Complete Exam of Visual System92014 | 1,189 | $145 |
| Photography of the Retina92250 | 859 | $43 |
| Imaging of Retina92134 | 505 | $46 |
| Established Patient Problem Focused Exam of Visual System92012 | 326 | $103 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 277 | $625 |
| Exam of Visual Field With Extended Testing92083 | 273 | $74 |
| Measurement of Corneal Curvature and Depth of Eye |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 521 | 192 |
| Moxifloxacin Hclbrand: Moxifloxacin | 521 | 268 |
| Prednisolone Acetate | 425 | 287 |
| Ketorolac Tromethamine | 422 | 270 |
| Timolol Maleate | 207 | 83 |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 199 | 153 |
| Tobramycin/Dexamethasonebrand: Tobramycin-Dexamethasone | 108 | 82 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$979 across 22 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-27
- Last updated
- 2015-01-16
Frequently asked questions
- What is Gregory Persak's NPI number?
- Gregory Persak's National Provider Identifier (NPI) is 1952372245, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Persak's specialty?
- Gregory Persak is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Persak located?
- Gregory Persak's practice location on file with NPPES is 360 Montauk Hwy, West Islip, NY 11795-4403.
- What is Gregory Persak's phone number?
- The practice phone number listed in the NPPES registry for Gregory Persak is (631) 422-1110.
- Does Gregory Persak accept Medicare?
- Gregory Persak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Persak's NPI active?
- Yes — Gregory Persak's NPI (1952372245) is active in the NPPES registry as of the last update on 2015-01-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.