Kathy S. Clark, M.D. Kathy S. Clark, M.D., a board certified radiologist, is medical director of pediatric radiology at Northwest Radiology Network. Dr. Clark graduated from medical school at Indiana University School of Medicine. She completed a residency in diagnostic radiology at Methodist Hospital of Indiana and fellowship in pediatric radiology at Riley Chidren's Hospital. Dr. Clark's special interests are gastrointestinal radiology and genital urinary radiology. She is a member of Radiological Society of North America, American Medical Association, American College of Radiology, Roentgen Ray Society, Society of Pediatric Radiology, Indianapolis Medical Society and Indiana State Medical Association.