4.1
60 Ratings with 24 written Reviews

Overview based on verified provider data
![]() | ![]() | ![]() | ![]() |
| Dr. Gregory Martin Haffner, MD | Dr. Yonca Ozkan Arat | Dr. Elwin Garth Schwartz | Dr. Nils Axel Loewen |
| Ophthalmology | Ophthalmology | Ophthalmology | Ophthalmology |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | |
| 25 Years of Experience | 29 Years of Experience | 50 Years of Experience | 28 Years of Experience |
| No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option |
| Speaks Spanish, Chinese | Speaks English | Speaks English | Speaks English |
| Hamden , CT | New Haven , CT | Middletown , CT | Pittsburgh , PA |
| Med School: Royal College Of Surgeons In Ireland School Of Medicine | Med School: Hacettepe Universitesi Tip Fakultesi | Med School: Cornell University | Med School: Albert-Ludwigs-Universitaet Freiburg Medizinische Fakultaet |
Current Profile | View Profile | View Profile | View Profile |
Dr. Gregory Martin Haffner holds an expired medical license in the state of Connecticut.
Medical Doctor with an expired medical license in the state of Connecticut that expired in 2026.
Completed their residency at Yale University School Of Medicine.
Graduated from Royal College Of Surgeons In Ireland School Of Medicine in 2001.
Dr. Haffner's NPI number is 1407886450.










Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.
Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.
Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.