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Edit this profileAt a glance
- 360 Montauk Hwy, West Islip, NY 11795
About Dr. Persak
Gregory Persak, M.D. practices ophthalmology in West Islip, NY. Gregory is a 1981 graduate of Boston University School of Medicine. Medicare claims data shows Gregory provided 4,615 services to 3,953 patients. The services billed most often include established patient complete exam of visual system, photography of the retina, and imaging of retina. The provider's National Provider Identifier (NPI) is 1952372245.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (631) 422-1110
- Email not available
Practice Locations
360 MONTAUK HWY
West Islip, NY 11795
Conditions Commonly Evaluated or Treated
Within Ophthalmology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Eye injury and cancer
- Chemical injury to the eye
- Foreign body in the eye
- Hyphema
- Open-globe eye injury
Inflammation, neurologic, and orbit
- Optic neuritis
- Optic neuropathy
- Orbital cellulitis
- Thyroid eye disease
- Uveitis
Most searched conditions
Cornea and external eye
Eyelid and tear drainage
Refractive and focusing
- Astigmatism
- Eye misalignment (strabismus)
- Farsightedness
- Lazy eye (amblyopia)
- Nearsightedness
- Presbyopia
Retina and vitreous
- Epiretinal membrane
- Retinal detachment
Eye injuries
Retina & vitreous
Procedures & services
Cataract and lens
- Cataract surgery with lens implant
- Laser-assisted cataract surgery
- Intraocular lens exchange
- YAG laser capsulotomy
Cornea and refractive
- Endothelial corneal transplant
Emergency and minor
- Corneal rust-ring removal
- Removal of an eye foreign body
- Repair of an eye or eyelid laceration
- Repair of ruptured globe
Examination and imaging
- Eye ultrasound
- Slit-lamp examination
- Visual-field testing
- Corneal topography
- Fluorescein angiography
Eyelid, tear duct, and muscle
- Chalazion removal
- Ectropion repair
- Eyelid surgery
- Tear-duct probing
- Drooping-eyelid repair
- Entropion repair
- Eye-muscle surgery
- Tear-duct bypass surgery
Glaucoma
- Cyclophotocoagulation
- Trabeculectomy
- Glaucoma drainage-device implantation
- Laser peripheral iridotomy
- Minimally invasive glaucoma surgery
- Selective laser trabeculoplasty
Retina
- Macular hole surgery
- Pneumatic retinopexy
- Retinal laser treatment
- Scleral buckle surgery
- Vitrectomy
Most searched procedures
- Cataract surgery
- Eye exam
- LASIK
- Retina surgery
Corneal procedures
- Amniotic Membrane Eye Graft
Eye diagnostics
Eye injuries
- Eye Scratch Laceration Repair
- Foreign Object Removal from Eye
Eyelid surgery
Laser eye surgery
- Laser Floater Removal
Laser procedures
- Laser Treatment for Retinal Tear
Laser vision correction
- SMILE Eye Surgery
Refractive surgery
- Clear Lens Exchange
- Implantable Contact Lenses
Tear duct & Orbit
- Orbital Decompression Surgery
- Tear Duct Plugs
Procedures Most Often Billed to Medicare
4,615 services · 3,953 patients · 22 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
277 | More often than most peers in Ophthalmology |
| Removal of recurring cataract in lens capsule using a laser | Procedure | 66821 |
87 | More often than most peers in Ophthalmology |
| Closure of tear duct opening using plug | Procedure | 68761 |
33 | As often as other peers in Ophthalmology |
| Laser repair to improve eye fluid flow | Procedure | 65855 |
18 | Less often than most peers in Ophthalmology |
| Complex removal of cataract with insertion of prosthetic lens | Procedure | 66982 |
14 | Less often than most peers in Ophthalmology |
| Removal of eyelashes using forceps | Procedure | 67820 |
13 | Less often than most peers in Ophthalmology |
| Ultrasound scan to determine eye length and lens power | Imaging | 76519 |
18 | Less often than most peers in Ophthalmology |
| Ultrasound scan of cornea to determine thickness | Imaging | 76514 |
14 | Less often than most peers in Ophthalmology |
| Established patient complete exam of visual system | Treatment | 92014 |
1,189 | More than most peers in Ophthalmology |
| Photography of the retina | Treatment | 92250 |
859 | More than most peers in Ophthalmology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other eye doctors at this location 3
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 2
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 24 related providers in 3 groups
Trained at Boston University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1981 at Boston University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of cataract with insertion of prosthetic lens 8
Providers in NY who bill this service to Medicare most often.
Common questions
What does Gregory Persak specialize in?
Gregory Persak is an eye doctor in West Islip, NY. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology”.
NPI registry
Where is Gregory Persak located?
Gregory Persak is listed at 360 Montauk Hwy, West Islip, NY 11795. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Gregory Persak's phone number?
The number on file is (631) 422-1110. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Gregory Persak?
Gregory Persak's National Provider Identifier is 1952372245. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Gregory Persak train?
Gregory Persak attended Boston University School of Medicine, graduating in 1981. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Gregory Persak have?
Gregory Persak has 45 years experience. Calculated from a graduation year of 1981, reported in the CMS National Downloadable File.
CMS public data
What does Gregory Persak do most often?
According to Medicare billing data, Gregory Persak performs procedures including removal of cataract with insertion of prosthetic lens, removal of recurring cataract in lens capsule using a laser and closure of tear duct opening using plug; reads or performs imaging such as ultrasound scan to determine eye length and lens power and ultrasound scan of cornea to determine thickness; provides treatments such as established patient complete exam of visual system and photography of the retina, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Gregory Persak's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Gregory Persak. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.