Our Doctors

Our doctors maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in the medical field. Read on to learn more about our staff's experience and training.


Michael Stierstorfer, M.D.

Dr. Stierstorfer is the founder of East Penn Dermatology and the IBS Centers for Advanced Food Allergy Testing. He specializes in medical, surgical and cosmetic dermatology. Dr. Stierstorfer graduated Phi Beta Kappa from Franklin & Marshall College and Alpha Omega Alpha from Temple University School of Medicine. He completed his Internal Medicine internship and Dermatology residency at the Dartmouth-Hitchcock Medical Center where he served as Chief Resident. He is a Clinical Associate Professor of Dermatology at the University of Pennsylvania School of Medicine where he supervises dermatology residents in training and was awarded a FacultyTeaching Award in 2008. He is a member of the American Academy of Dermatology, Pennsylvania Academy of Dermatology and Dermatological Surgery, and Philadelphia Dermatological Society. Dr. Stierstorfer pioneered the discovery that hidden food allergies often are the cause of irritable bowel syndrome (IBS) and offers skin patch testing to pinpoint these allergies at the IBS Centers for Advanced Food Allergy Testing in North Wales and in Center City Philadelphia. He has published in a number of peer-reviewed dermatology journals, is a clinical investigator independently and for the University of Pennsylvania, and a participant in the Major League Baseball Skin Cancer Screening and Awareness Program.



Marvin Sasson, M.D.

Dr. Sasson graduated Phi Beta Kappa from Brandeis University and Alpha Omega Alpha from New York University School of Medicine. He completed his Internal Medicine internship at the Hospital of the University of Pennsylvania and his dermatology residency at Washington University in St. Louis. He joined the faculty at Washington University, teaching residents and medical students, before coming to East Penn Dermatology. He is certified by the American Board of Dermatology and is a member of the American Academy of Dermatology, Pennsylvania Academy of Dermatology and Dermatological Surgery, and Philadelphia Dermatological Society.

Contact Us

East Penn Dermatology, P.C.
311 N. Sumneytown Pike, Suite 1E
North Wales, PA 19454

Phone (215) 661-0300
Fax (215) 661-0302

Office Hours
Monday:8:30 AM - 4:30 PM
Tuesday:8:30 AM - 4:30 PM
Wednesday:8:30 AM - 4:30 PM
Thursday:8:30 AM - 4:00 PM
Friday:8:30 AM - 4:00 PM
Saturday:Closed
Sunday:Closed