Mary B. Toporcer, MD

Medical Education and Training

Medical School:  Hahnemann University 1980-1984
Intern and Resident of Internal Medicine:  Pennsylvania Hospital (Philadelphia, PA) 1984-1987,
Dermatology Resident:   Hahnemann University (Philadelphia, PA)  1988-1991,

A Note from Dr. Toporcer

I was raised in a very small town in northeastern Pennsylvania. My personal family physician was my most noted role model. I volunteered during the summers while in high school at local hospitals. Subsequently, I entered into a six year pre-med / MD program at Wilkes College in affiliation with Hahnemann University. I was fascinated by the mechanics of the human body and of disease. Microbiology was my favorite subject in medical school. In 1984 I was proud to have been accepted into the Internal Medicine residency program at Pennsylvania Hospital in Philadelphia. It was and still is a strong clinically based training program, assumed under the guidance of many brilliant and caring doctors and teachers. I had a desire to specialize to become more of an "expert" in a given field. I spent two years as an attending physician in Pennsylvania Hospital's emergency room and loved the challenges that walked through the doors. I continued to gain further insight and knowledge from my colleagues. Subsequent to my ER experience, I decided to attempt to secure a dermatology residency so that I could continue to care for infants, children, adults, and pregnant women, along with continuing to perform minor surgical procedures. I loved the mysteries that lay within where much of the evidence presents on the skin. Here I felt blessed to have a strong basis in medicine. I spent three years of Dermatology training at Hahnemann University and St. Christopher's Hospital for Children. The broad spectrum of diseases that I was privileged to discover in this population created my strong foundation for clinical dermatology. My training directors and instructors were exceedingly bright, positive, devoted individuals who made it their personal responsibility to make us/me one of the best.

At present, I fully enjoy my solo private practice as a general dermatologist and my life as a mother of three incredible children. The challenges never stop, but the personal rewards are great. I hope to live each day discovering, teaching and learning both at work and at home.


Dr. Wiedersum

Medical Education and Training

Dr. Wiedersum was raised in Jamison, Pennsylvania and attended Central Bucks School District from kindergarten through high school. Her anatomy and physiology class in high school at CB South gave her the opportunity to rotate through Doylestown Hospital and piqued her interest in the medical field. She went on to study pre-med and earn her Bachelor of Science degree in biology from Loyola University Maryland in Baltimore. She obtained her medical degree from Philadelphia College of Osteopathic Medicine.

During her third year of medical school, Dr. Wiedersum used her elective time to rotate through a dermatology office she was very familiar with, that of her own dermatologist, Dr. Toporcer. It was during that month that Dr. Wiedersum decided she would complete medical school with the goal of continuing her training in dermatology. She completed her internship at Lehigh Valley Health Network in Allentown and her dermatology residency at Hackensack Meridian Health in northern New Jersey. Dr. Wiedersum served as the chief resident during her final year of residency. She is an active member of the American Academy of Dermatology, American Osteopathic College of Dermatology and Women’s Dermatologic Society.

Dr. Wiedersum enjoys all areas of dermatology including medical, surgical and cosmetics and has experience treating pediatric, adolescent and adult patients. She recently moved back to the area with her husband and daughter and is looking forward to serving her home community.


Minnie Reger, RN, BSN, CRNP

Medical Education and Training

I was born and raised in Seoul, South Korea.   While growing up in South Korea, I attended a foreign language high school and took an interest in American pop artist and television shows, all of which helped me to learn the English language.   I entered nursing school at Yonsei University and received my BSN after 4 years of a great education.   After college I spent some time teaching English to high school students.   I started my nursing career as an Operating Room nurse and ultimately became an orthopedic specialist RN.   I made the bold decision to move to the United States and settled in the San Diego area, where I met my husband and continued my nursing career in an outpatient surgery center in LaJolla, where I eventually served as an OR Supervisor.  My family relocated to Pennsylvania and I took a position as an OR staff nurse at Doylestown Hospital.   In 2013 I was accepted into the Nurse Practitioner program at Gwynedd Mercy University.   Since 2016 I was very excited to join the team at Dr Toporcer’s office, and I am committed to maintaining the high standard of clinical practice that Dr Toporcer has established.   Lifelong learning and a compassionate approach to patient care, are guiding principles for my practice.

I currently reside in Worcester Township with my husband and two children.  I enjoy traveling, wine tasting, and of course, watching Korean TV dramas!