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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).

Patient Reviews

Patient comments (0)

The overall average patient rating of Dr. Mark Duffy is Excellent. Dr. Duffy has been reviewed by 5 patients who have provided 0 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 4.0
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. Mark Duffy, MD, PHD is board certified in Ophthalmology.

  • He has special expertise in 5 areas:
  • Eye Surgery (Ophthalmologic Surgical Procedures)
  • Eyelid Cancer
  • Eyelid surgery (Blepharoplasty)
  • Plastic Surgery (Cosmetic & Reconstructive Surgery)
  • Wounds and Injuries

Education & Awards

Dr. Duffy graduated from University of Illinois at Chicago.


Dr. Duffy has 18 hospital affiliations:

  • St. Mary's Hospital Medical Center-Madison 
  • Aurora Sinai Medical Center 

> > > > Dr. Mark Duffy, MD, PHD

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Additional Information
Dr. Mark T Duffy MD and PHD is a male Ophthalmologist, has 19 years of experience and practices in Ophthalmology.
Where does Dr. Mark T. Duffy practice?
Dr. Mark Duffy has 2 office locations.
Dr. Mark Duffy practices Ophthalmology near Green Bay, WI.
See Green Bay Ophthalmologists.