Providers / Dr. Dianne DeKeyser, MD


Dr. Dianne DeKeyser, MD

Adult Psychiatrist


Dianne DeKeyser, MD, is a board-certified psychiatrist with a broad range of experience in outpatient and inpatient psychiatry. At Serenity Mental Health Centers in the Desert Ridge neighborhood of Phoenix, Arizona, Dr. DeKeyser sees patients aged 18-60 seeking treatment for depression, anxiety, substance abuse, and other common mental health challenges.

After earning her medical doctorate from Spartan Health Sciences University School of Medicine in Vieux Fort, St. Lucia, in the Caribbean, 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.

With groundbreaking treatments like ketamine therapy and transcranial magnetic stimulation (TMS therapy), Dr. DeKeyser hopes to support 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.

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 is excited to meet and connect with new patients at Serenity Mental Health Centers.



Let’s take the next step together. Schedule an appointment today and let’s work together to help you take back your life.

Serenity Mental Health Centers
Located in Arizona, Utah, and Colorado