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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Gregory Haffner:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (21)

The overall average patient rating of Dr. Gregory Haffner is Good. Dr. Haffner has been reviewed by 52 patients who have provided 21 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 3.5
Promptness 3.3
Courteous Staff 3.5
Accurate Diagnosis 3.6
Bedside Manner 3.5
Spends Time with Me 3.5
Follows Up After Visit 3.5

Specialties & Research

Dr. Gregory Haffner, MD is board certified in Ophthalmology.

  • He has special expertise in 1 area:
  • Retinal Disorders

Education & Awards

Dr. Haffner graduated from Royal College Of Surgeons In Ireland, Dublin.


Dr. Haffner has 4 hospital affiliations:

  • William W Backus Hospital 
  • Hospital Of St Raphael 


  • Spanish

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Additional Information
Dr. Gregory Haffner MD is a male Ophthalmologist, has 10 years of experience and practices in Ophthalmology.
Where does Dr. Gregory Haffner practice?
Dr. Gregory Haffner has 1 office location.
Dr. Gregory Haffner practices Ophthalmology near Hamden, CT.
See Hamden Ophthalmologists.