Mount Airy Family Practice, a PentaHealth Practice, is a partnership of board certified family physicians and nurse practitioners. Family medicine is a medical specialty anchored firmly in the biological, clinical and behavioral sciences. We provide continuing, comprehensive healthcare for the individual while emphasizing the health of the family. Family medicine medical providers, like us, provide care for men, women, children and infants - there is no age limit to the patients a family medicine medical provider serves. There is no part of the body, no disease or condition excluded from the family medicine medical provider's care. In every sense, today's family medicine medical provider is what patients throughout history had in mind when they used the term "doctor."  Our primary commitment is to excellence in patient care, we accomplish this with the help of our front desk staff, nurses, and medical assistants.

Our Providers

Lauren Kummer, MD

Dr. Kummer is a graduate of Temple University School of Medicine, she is interested in women's health, sports medicine, and office procedures. Dr. Kummer sees patients of all ages.

Susan Leath, MD

Dr. Leath graduated from the Medical College of Pennsylvania, she holds a Bachelors Degree from Yale University. She is an active member of local health initiatives in Philadelphia.

David Lewis, MD

Dr. Lewis graduated from Wayne State Univeristy School of Medicine in Detroit. He has a special interest in Dermatology and performs many in office procedures.

Thomas Lyon, MD

Dr. Lyon graduated from Temple University School of Medicine, a former president of the Chestnut Hill Hospital Medical Staff, Dr. Lyon has a certification in geriatric medicine from the American Board of Family Medicine.

Marissa Patterson, CRNP

Ms. Patterson has nursing degrees from Yale and Johns Hopkins and an undergraduate degree from Bryn Mawr College. She has special interest in pediatric and adolescent health as well as gynecology and reproductive care.

Jared Von Arx, PhD

Dr. Von Arx earned his PhD in Clinical Psychology from the University of Virginia. He does psychotherapy and clinical assessments with adults, adolescents, and children, as well as family therapy. He specializes in mental health issues such as depression, anxiety, relationship issues, trauma, and major life transitions.