Marianne Cowley, M.D.

Headshot of Marianne Cowley


Age-Related Macular Degeneration, Diabetic Retinopathy, Macular Degeneration, Macular Disorders, Ocular Melanoma, Ophthalmology, Retinal Detachment, Retinal Disease, Vitreous Disease more

Research Interests

Vitreoretinal diseases (retina and vitreous)

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Insurance Information

Main Phone

Outside of Maryland & Washington D.C.

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International Patients

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Johns Hopkins Wilmer Eye Institute - Frederick

Appointment Phone: 301-620-9268
161 Thomas Johnson Drive
Suite 275
Frederick, MD 21702
Johns Hopkins Wilmer Eye Institute - Frederick - Google Maps


Marianne Cowley, M.D., is a clinical associate of ophthalmology and retina specialist at the Wilmer Eye Institute's Frederick, Maryland location. Dr. Cowley specializes in the diagnosis and treatment of conditions such as age-related macular degeneration (dry and wet) and diabetic retinopathy.

Dr. Cowley comes from private practice where she has focused on clinical excellence and patient experience in retinal care. For many years, Dr. Cowley volunteered her services with the university of Louisville and has made trips internationally to assist in providing retinal care. more

Departments / Divisions



  • MD; Albany Medical College (1982)


  • Ophthalmology; Ochsner Clinic Foundation (1985)
  • Ophthalmology; University of Louisville School of Medicine (1987)


  • Ophthalmology; University of Virginia School of Medicine (1988)

Board Certifications

  • American Board of Ophthalmology (Ophthalmology) (1989)
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