Dr. Margaret E. Chappen

Dr. Lewis is a board-certified physician specializing in internal medicine and pediatrics. His clinical interests include immunology, infectious diseases and Alzheimer’s disease. Dr. Lewis obtained his medical degree from the Philadelphia College of Osteopathic Medicine. He completed his residency at Geisinger Medical Center. He is certified by the American Board of Internal Medicine and the American Board of Pediatrics. Dr. Lewis is rated as an Advanced provider by MediFind in the treatment of Venous Thromboembolism (VTE). His top areas of expertise are Maturity Onset Diabetes of the Young, Enlarged Prostate (BPH), Type 2 Diabetes (T2D), and End-Stage Renal Disease (ESRD).

Dr. Sundaresan is a board-certified physician specializing in pediatrics and internal medicine. Her clinical interests include preventive care and chronic disease management. Dr. Sundaresan attended Christian Medical College, Vellore, where she earned her degree in medicine. She completed her residency at Geisinger Medical Center. She is certified by the American Board of Pediatrics and by the American Board of Internal Medicine. Dr. Sundaresan is rated as an Experienced provider by MediFind in the treatment of Venous Thromboembolism (VTE). Her top areas of expertise are Sinusitis, Maturity Onset Diabetes of the Young, Type 2 Diabetes (T2D), and Relapsing Multiple Sclerosis (RMS).

Natthapol Songdej is a Hematologist and a Pediatrics provider in Hershey, Pennsylvania. Dr. Songdej is rated as a Distinguished provider by MediFind in the treatment of Venous Thromboembolism (VTE). His top areas of expertise are RUNX1 Familial Platelet Disorder, Acute Myeloid Leukemia (AML), Acute Myeloblastic Leukemia without Maturation, Acquired Hemophilia, and Bone Marrow Aspiration.