Meet the Team
Get to know the providers at Psychiatric Associates. Our team brings a range of clinical experience and a shared commitment to personalized, compassionate psychiatric care.
Meet Your Providers
John M. Rahhal, MD
Board-Certified Psychiatrist
An Oklahoma native, Dr. Rahhal completed his undergraduate studies in microbiology, medical school, and psychiatry residency at the University of Oklahoma. He has been part of Psychiatric Associates since 1990 and board-certified in psychiatry since 1991.
He brings a casual, welcoming approach to appointments and encourages patients to feel comfortable being themselves. His interests include sports therapy, hiking, and mountain climbing.
Cassadie Farnsworth, PA-C
Board-Certified Physician Associate
Cassadie earned degrees in psychology and biology at the University of Oklahoma and a master's in Physician Assistant Studies at Oklahoma City University.
Her approach combines medication management, psychotherapy, and an understanding of the social and environmental factors that affect mental health. She strives to create a welcoming, judgment-free space where patients feel heard and supported.
Outside of work, she enjoys time with her husband and two mini Australian Shepherds, basketball, and running an online support group for people with type 1 diabetes.
Brandie Strange, APRN-CNP, PMHNP-BC
Dual Board-Certified Family Practice and Psychiatric Mental Health Nurse Practitioner
Brandie combines extensive outpatient psychiatric experience with a background in family medicine, considering both mental and physical health when developing individualized treatment plans.
An Air Force veteran, she understands the challenges faced by military families, first responders, and foster care families. Her medical career began as a paramedic in 1999, followed by nursing in the ICU, emergency department, and PACU. She has practiced as a nurse practitioner since 2013.
Outside of work, she can often be found at sporting events supporting one of her seven children.
Active-duty service members, veterans, and first responders should identify their status when requesting an appointment for priority consideration.
Rachael Tromley, APRN-CNS
Board-Certified Psychiatric Clinical Nurse Specialist
Sue Rollins, APRN-CNS
Board-Certified Psychiatric Clinical Nurse Specialist
Sue brings experience in community behavioral health, with a special interest in trauma-informed care. She takes a compassionate, patient-centered approach to helping individuals navigate life's challenges.
An Oklahoma native, she enjoys glass art, hiking, reading, photography, and rescuing animals.
Provider availability and new patient acceptance vary. Please contact the office to confirm.
Take the Next Step
Contact our office to learn more about our providers and the new-patient process.