Led by Brian McCullough, PMHNP-BC, our team brings over 20 years of combined medical experience to the Phoenix, Surprise, and Sun City West communities. We are Board-Certified Psychiatric Mental Health Nurse Practitioners and Therapists dedicated to a holistic approach—treating the whole person, not just the symptoms.

Whether you need ADHD testing, medication management, or support for anxiety and depression, our providers offer compassionate, evidence-based care. We are currently accepting new patients in the North Valley and West Valley. We’d be happy to talk; please contact us with any questions.

Brian McCullough

Brian is the owner of Serene Psychiatry. He specializes in treating both Child and Adult ADHD, anxiety, and mood disorders. With a background in nursing leadership and a commitment to patient education, Brian focuses on finding the right medication balance for your lifestyle.

Nathan Porter

Nathan offers a holistic perspective on mental health, focusing on emotional and physical well-being alongside psychiatric care. With over a decade of nursing experience, he provides expert treatment for PTSD, depression, and ADHD to patients in Surprise, Sun City West and Phoenix.

Ally Farrell

Ally is a Licensed Associate Marriage and Family Therapist. She is dedicated to helping individuals, couples, and families navigate life’s challenges and enhance their relationships.

Ally holds a Masters degree in Marriage and Family Therapy. With a strong background in systemic therapy, Ally specializes in addressing issues such as communication problems, relational conflicts, anxiety, depression, and life transitions. In her spare time, she enjoys spending time with her two dachshunds, hiking, and baking.

Charles Gunder-Heier

Charles is a dedicated Psychiatric Nurse Practitioner with an extensive background in healthcare, including emergency medicine and surgical services. Drawing from years of front-line clinical experience, Charles brings a comprehensive perspective to mental health care, ensuring that patients receive compassionate, individualized support.

Jennifer Brooks

Jennifer is a Psychiatric-Mental Health Nurse Practitioner with 15 years of experience in medicine, including extensive work with high-acuity patients. Her background has shaped a steady, thorough clinical approach grounded in safety, evidence-based care, and compassionate communication.

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Ready to prioritize your mental well-being?