Board Certified Dermatologist & Mohs Surgeon

Dr. Abraham is a board-certified dermatologist and one of Philadelphia’s most senior Mohs Surgeons. After attaining his undergraduate degree at Temple University, Dr. Abraham attended Jefferson Medical College.  He completed his ​internship at Thomas Jefferson University and his ​dermatology training at​ the​ Temple University Skin and Cancer Hospital. Dr. Abraham ​is a fellow of the American Society for Mohs Surgery.

Dr. Abraham maintains the highest levels of accreditation and pursues ongoing education to stay abreast of the latest trends in dermatology.  He provides a full range of dermatologic care with a special interest in skin cancer screening/treatment and treatment of psoriasis using various modalities including phototherapy and various new biologic therapies. Dr. Abraham treats patients of all ages.

In addition to his love of dermatology and caring ​of patients, Dr. Abraham enjoys the theater and visual arts with his wife Ellen, who is a prolific ​artist.

Dr. Deirdre Wood received her medical degree from Hahnemann University/Medical College of Pennsylvania in 1996. She continued with an internship in International Medicine at both the Medical College of Pennsylvania Hospital and the Philadelphia Veteran's Administration. Afterward, she began a Dermatology Residency at Hahnemann. She completed four additional years of training including a specialty fellowship in cutaneous lymphomas. She was Chief Resident during her final year.

Board-Certified Dermatologist

 Howard Rosenman, MD is board certified by the American Board of Dermatology. He provides patient-centric dermatologic care for a variety of skin conditions and patients with all skin types. He treats adults and children and provides medical, surgical, and cosmetic services.

Dr. Rosenman attended Syracuse University in New York and earned his medical degree at the State University of New York Downstate Medical Center in Brooklyn, NY. He completed his internship in Internal Medicine at Lankenau Hospital in Wynnewood, PA. His residency in dermatology was at Kings County Hospital in Brooklyn, NY where he was the Chief Resident in Dermatology. He also served as Chief of Dermatology at Capital Health Systems.

Dr. Rosenman currently serves as a Clinical Professor of Dermatology at the University of Pennsylvania. He is a member of the American Academy of Dermatology, the Pennsylvania Medical Society, the Bucks County Medical Society, the Pennsylvania Academy of Dermatology, and the Philadelphia Dermatological Society.

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 Dermatologist 

Dr. Stephanie A. Mackey was born and raised in Williamsport PA and graduated magna cum laude from Penn State University honors college with a biology degree. She received her medical degree from the Penn State College of Medicine and was a member of the Alpha Omega Alpha Medical Honor Society.

She then completed her internal medicine internship at Hershey Medical Center and dermatology residency at Geisinger Medical Center in Danville, PA.

She is a board-certified member of the American Academy of Dermatology, and also has memberships in the Pennsylvania Academy of Dermatology and the Lancaster County medical society, having served as president of both the state and local societies.

Dr. Mackey practices general medical dermatology and enjoys treating patients of all ages.  Diagnosing and treating skin cancer is particularly meaningful due to the impact it has on a patient’s life. Educating family practice residents from Lancaster General Hospital has been a passion of hers for many years and she has received numerous teaching awards.  She was named the top dermatologist by the Lancaster County Magazine’s reader’s poll in 2019, 2020, and 2021.

She is an avid outdoor enthusiast and enjoys biking rail-trails around the country, as well as hiking and teaching Body Pump classes at her local rec center. For the past two decades, she has rescued retired greyhounds, having a special affinity for the senior hounds. 

Board Certified Dermatologist 

Steven R. Weasen, MD grew up in the Bronx, NY. Dr. Weasen attended the Bronx High School of Science and Stony Brook University. He graduated from Ohio State University School of Medicine followed by a general internship in dermatology at the Cleveland Clinic Hospital.

Dr. Weasen is board certified in dermatology and is a fellow of the American Academy of Dermatology. He is a member of the Pennsylvania Academy of Dermatology and Philadelphia Dermatologic Society. Dr. Weasen has a special interest in skin cancer screening and treatment. He practices general medical dermatology and enjoys treating both children and the elderly.

Dr. Weasen is an avid sports fan and enjoys playing basketball and tennis. He met his wife, Stephanie Knapp (Allergist) at his Cleveland Clinic Dermatology Residency. He has 3 adult children.