Dr.Tallan DePriest D.O.

Dr. Tallan DePriest is a physician who incorporates a holistic approach to mental health. He includes social, behavioral, and physical elements in his treatment plans. He attended Touro University School of Osteopathic Medicine in Las Vegas, Nevada and then psychiatric residency in Macon, Georgia before returning to his home state of Arizona.  Dr. DePriest is board certified in psychiatry by the American Board of Psychiatry and Neurology and also in addiction medicine by the American Osteopathic Academy of Addiction Medicine.   He is experienced in a variety of patient populations including pediatrics, addiction, and forensics he has worked extensively in both inpatient and outpatient settings.  He is fluent in Spanish and in his spare time he enjoys playing sports, watching college football, and reading.

Katlyn Greathouse PMHNP-BC

Katlyn Greathouse, PMHNP-BC,  is a psychiatric-mental health nurse practitioner who utilizes an individualized, evidence-based approach to helping those with mental health needs. She includes her background in both critical care and psychiatry to incorporate a holistic approach into her treatment plans. She attended Tennessee Technological University in Cookeville, TN, for both her Bachelor and Master of Science in Nursing degrees and has recently moved with her family to Arizona to begin practicing. Katlyn Greathouse is board certified in psychiatry through the American Nurses Credentialing Center. Most of her experiences have been adults, but she has also worked with the pediatric, geriatric, and serious mental illness (SMI) populations. She can treat a wide range of psychiatric conditions. In her spare time, Katlyn enjoys traveling with her husband, playing with her three animals, and catching up on Netflix shows.

Devin Southworth, NP, in a white coat with a gray polo, standing in front of a neutral textured background.

Devin Southworth PMHNP-BC

Devin Southworth is a Board-Certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) with specialized expertise in diagnosing and treating psychiatric disorders across the lifespan. His primary focus is on providing compassionate, tailored care for pediatric patients (ages 6–17) as well as young adults up to age 65

Devin earned his Master of Science in Nursing with a concentration in Psychiatric Mental Health from Virginia Commonwealth University. He also holds a Bachelor of Science in Nursing from Grand Canyon University and an Associate of Science in Nursing from Eastern Arizona College.

With a strong clinical background and advanced skills in mental health care, Devin is dedicated to delivering comprehensive evaluation, diagnosis, and management of a wide spectrum of psychiatric disorders. He is particularly passionate about supporting children and adolescents through a compassionate, patient-centered approach, empowering them to thrive at every stage of their mental health journey.