Dr. McWilliams is a graduate of Temple University School of Medicine. She trained in Internal Medicine at Pennsylvania Hospital in Philadelphia. Dr. McWilliams is Board certified in Internal Medicine and Addiction Medicine, and has been practicing since 2007. She has served as an attending physician for the Department of Public Health at a community health center in Philadelphia and the Medical Director at Inglis House, a nursing home in Philadelphia, PA. Her interest includes addiction medicine and treating patients with co-occurring mental health and substance abuse disorders. She acted as the lead Physician at Malvern institute, a drug and alcohol rehab facility in Malvern, PA. She has served as the Medical Director at Recovery Center of America in Devon, PA a comprehensive drug and alcohol addiction treatment facility, since August 2017.