After earning her medical doctorate from Spartan Health Sciences University School of Medicine in Vieux Fort, St. Lucia in 2001, Dr. DeKeyser completed her residency training at New York Medical College in Valhalla, New York. She worked in the Midwest for 15 years before returning to Arizona to practice psychiatry.

Since moving back to Arizona, Dr. DeKeyser enjoys spending time with her family at home. In addition, she speaks Italian and loves to travel.

Dr. DeKeyser has a passion for supporting everyday people in their mental health journey. With groundbreaking treatments like ketamine therapy and transcranial magnetic stimulation (TMS therapy), she hopes to help her patients in achieving their full potential and a better quality of life. She also provides ADHD testing, medication management, and other traditional treatment methods. Dr. DeKeyser is excited to meet and connect with new patients at Serenity Mental Health Centers.