Sean Leonard, PMHNP-BC, Psychiatry in Oceanside, California

Sean Leonard, PMHNP-BC, helps teens and adults across California manage complex mental health conditions through personalized, evidence-based psychiatric care, including medication management and advanced treatments. As a Nurse Practitioner at LifeStance Health, he partners with patients to address symptoms, improve daily functioning, and support long-term stability. Sean specializes in treating ADHD, anxiety, and substance use concerns, while also supporting individuals facing depression and other mental health challenges. Sean provides care for teens, young adults, adults, and seniors, offering thoughtful evaluation and treatment planning tailored to each stage of life. He has experience working with diverse populations, including individuals with autism spectrum disorders, military and veteran communities, and those identifying as LGBTQ+. His approach emphasizes understanding each patient’s unique experiences while delivering clinically sound care that addresses both mental health and co-occurring medical concerns. Sean is committed to helping individuals build resilience, manage symptoms such as mood instability or sleep disturbances, and achieve meaningful progress toward their goals. He is bilingual and offers care in Spanish, helping expand access to mental health treatment for a broader community. Outside of his clinical work, Sean enjoys mountain biking and spending quality time with his family.