> > > > Dr. Mark Duffy, MD, PHD
Dr. Mark Thomas Duffy MD and PHD is a male Ophthalmologist, has 18 years of experience and practices in Ophthalmology.
Video profile
Dr. Mark Duffy has 4 office locations.
Baycare Clinic Green Bay Eye Clinic
2140 Velp Ave
Green Bay, WI 54303

Phone Number
Locations and availability (4)
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).

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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 11 hospital affiliations:

  • Aurora Baycare Medical Center 
  • Aurora Medical Center of Washington County 

Accepted Insurance Plans

Dr. Duffy accepts these health insurances in at least one office:

  • United Healthcare - 2 plans
  • Great-West Healthcare - 2 plans
  • Medica Health Plans - 2 plans
  • Anthem - 2 plans
  • Evercare - 2 plans
  • Humana - 2 plans
  • Cigna - 2 plans
  • Aetna - 2 plans

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Additional Information
Where does Dr. Mark T. Duffy practice?
Dr. Mark Duffy practices Ophthalmology near Green Bay, WI.
Additional practice locations include: Oshkosh, WI.
See Green Bay Ophthalmologists.