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Edit this profileAt a glance
- 4277 Hempstead Tpke, 109, Bethpage, NY 11714
About Dr. Cowan
Based in Bethpage, NY, Gregory Cowan, MD is listed in the NPI registry under ophthalmology. Gregory graduated from George Washington University School of Medicine in 1988. According to Medicare claims data, Gregory cared for 2,761 Medicare patients across 3,521 services. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, exam of visual field with extended testing, and imaging of optic nerve. NPI 1275640716 identifies this record in the national registry.
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
- (516) 796-4030
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
4277 HEMPSTEAD TPKE 109
Bethpage, NY 11714
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
Inflammation, neurologic, and orbit
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
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
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
Most searched procedures
Corneal procedures
Eye diagnostics
Eye injuries
Eyelid surgery
Laser eye surgery
Laser procedures
Laser vision correction
Refractive surgery
Tear duct & Orbit
Procedures Most Often Billed to Medicare
3,521 services · 2,761 patients · 15 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Closure of tear duct opening using plug | Procedure | 68761 |
133 | More often than most peers in Ophthalmology |
| Laser repair to improve eye fluid flow | Procedure | 65855 |
51 | More often than most peers in Ophthalmology |
| Creation of eye fluid drainage tracts in iris using a laser, per session | Procedure | 66761 |
39 | More often than most peers in Ophthalmology |
| Ultrasound scan of cornea to determine thickness | Imaging | 76514 |
60 | More often than most peers in Ophthalmology |
| Exam of visual field with extended testing | Treatment | 92083 |
651 | More than most peers in Ophthalmology |
| Imaging of optic nerve | Treatment | 92133 |
464 | More than most peers in Ophthalmology |
| Photography of the retina | Treatment | 92250 |
345 | More often than most peers in Ophthalmology |
| Exam of the internal drainage system of eye | Treatment | 92020 |
338 | More than most peers in Ophthalmology |
| Established patient complete exam of visual system | Treatment | 92014 |
270 | As often as other peers in Ophthalmology |
| Established patient problem focused exam of visual system | Treatment | 92012 |
144 | As often as other 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 4
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other eye doctors in Bethpage 5
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at George Washington University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1988 at George Washington University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Closure of tear duct opening using plug 8
Providers in NY who bill this service to Medicare most often.
Common questions
What is Dr. Cowan's specialty?
Dr. Cowan is an eye doctor in Bethpage, NY. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology”.
NPI registry
Where can I find Dr. Cowan?
Dr. Cowan is listed at 4277 Hempstead Tpke 109, Bethpage, NY 11714. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Cowan?
The number on file is (516) 796-4030. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Cowan's NPI number?
Dr. Cowan's National Provider Identifier is 1275640716. 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
What is Dr. Cowan's medical education?
Dr. Cowan attended George Washington University School of Medicine, graduating in 1988. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Cowan been practicing?
Dr. Cowan has 38 years experience. Calculated from a graduation year of 1988, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Cowan known for?
According to Medicare billing data, Dr. Cowan performs procedures including closure of tear duct opening using plug, laser repair to improve eye fluid flow and creation of eye fluid drainage tracts in iris using a laser, per session; reads or performs imaging such as ultrasound scan of cornea to determine thickness; provides treatments such as exam of visual field with extended testing and imaging of optic nerve, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Cowan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Cowan. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.