Dr. Hawes is a board certified pediatrician and fellow of the American Academy of Pediatrics, with specific emphasis in child and adolescent development and behavior. She obtained her bachelor’s degree in medical anthropology at the University of Notre Dame, and her doctorate of medicine from Baylor College of Medicine. She completed her post-graduate training in pediatrics through the University of Tennessee College of Medicine at Erlanger TC Thompson Children’s Hospital here in Chattanooga. Dr. Hawes has additional training through the American Academy of Pediatrics, section on developmental and behavioral pediatrics. Dr. Pittman is a consult and mentor to Dr. Hawes on patients with more complex psychiatric presentations. Her interests include the impact of trauma on development and behavior; autism spectrum disorder, attention deficit hyperactivity disorder, and other neurodevelopmental conditions; medically complex patients with behavioral concerns; mood disorders including depression and disruptive mood dysregulation disorder; anxiety disorders and obsessive compulsive disorder; as well as eating disorders and substance abuse in adolescents.

Dr. Cassandra Simms is board certified in Adult and Child/Adolescent Psychiatry by the American Board of Psychiatry and Neurology. She earned her medical degree from the University of Kentucky in 1999 and completed her Psychiatry Residency and Child/Adolescent Fellowship at the University of South Carolina, where she served as Chief Resident for the Child & Adolescent Fellowship Program.
In 2004, Dr. Simms moved to Chattanooga, Tennessee, where she worked with Focus Psychiatric Services and Parkridge Valley Hospital, treating children and adolescents in both outpatient and inpatient settings. She later served as a faculty member with the University of Tennessee School of Medicine, contributing to clinical education for medical students. From 2012 to 2015, she provided both outpatient and inpatient behavioral health services through Community Health Systems in Cleveland, Tennessee.
Dr. Simms currently collaborates with organizations such as Health Connect and Centerstone, providing medical management and supervising nurse practitioners across the region.

Mark Jennings, MD completed medical school in Galveston, Texas and residency in Pediatrics, Psychiatry, and Child Psychiatry in Lexington, Kentucky. He has been in Chattanooga since 1999. He works with children of all ages and their families. He is a firm believer in utilizing behavioral and environmental approaches to address any problems in addition to medical interventions.