Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Gregory Cowan, MD

Individual provider Ophthalmology Physician · NPI 1275640716

Gregory Cowan, MD is an Ophthalmology in Bethpage, New York. Graduated from George Washington University School of Medicine in 1988, 38 years ago. Practices with Sight Medical Doctors PLLC, a 114-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
38
Trained at
George Washington University School of Medicine
Licensed in
NY
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

4277 Hempstead Tpke 109
Bethpage, NY 11714
Phone: (516) 796-4030
Fax: (516) 796-5134
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence 178691 (NY)

Record details

NPI number1275640716
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 23, 2006
Last updated in NPPESMay 1, 2008
Mailing address4277 Hempstead Tpke, 109, Bethpage, NY 11714

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPHTHALMOLOGY
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1988 (38 years in practice)
Group practice Sight Medical Doctors Pllc — 114 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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