Karen Deasey, MD, FAAD

Board Certified Dermatologist 

Dr. Karen Deasey graduated from Dickinson College with a Bachelor’s degree in Biology before going on to attend the Medical College of Pennsylvania. She completed her internship at Abington Memorial Hospital and her dermatology residency at the Hospital at the University of Pennsylvania in Philadelphia. Dr. Deasey opened her Dermatology practice in Bryn Mawr in 1980. She has also served as Chief of Service for Dermatology for the Main Line Health System.

Dr. Deasey is a board-certified dermatologist with an active practice in Bryn Mawr. She enjoys all aspects of skin diseases, particularly complex rashes, psoriasis, atopic dermatitis, and the diagnosis and treatment of skin cancers and melanoma. She believes in treating the whole patient, always asking questions about their overall health in addition to treating their skin concerns. She sees patients of all ages and strives to provide a warm and welcoming environment from the minute patients walk into her office.

Dr. Deasey is an active member of the PA Academy of Dermatology, PA Medical Society, American Academy of Dermatology, the Philadelphia Dermatology Society, and the Philadelphia Medical Club of Women.

She lives with her husband, Frank, and has two adult sons. In her free time, Dr. Deasey is an avid gardener and attempts to play golf. She loves to travel with her husband and is an active member of her church, singing in the church choir.


Board Certified by the American Board of Dermatology


Dickinson College

Medical College of Pennsylvania (now Drexel University College of Medicine)

Abington Memorial Hospital

University of Pennsylvania

Professional Affiliations:

PA Academy of Dermatology

PA Medical Society

Fellow of the American Academy of Dermatology

Philadelphia Dermatology Society

Philadelphia Medical Club of Women