Meet Your Provider
About
Oscar Castillo
PMHNP-BC
Oscar Castillo is a board-certified Psychiatric Mental Health Nurse Practitioner dedicated to providing thoughtful, inclusive, and personalized care. Based in Southern California, he works with adolescents and adults navigating anxiety, depression, ADHD, mood disorders, trauma, and more. His approach is grounded in both clinical expertise and genuine human connection, creating a space where patients feel heard, understood, and supported throughout their care.
Oscar takes a holistic, patient-centered approach, focusing on understanding each individual’s unique experiences, background, and goals. He has a strong commitment to serving youth, LGBTQ+ individuals, and immigrant communities, offering culturally aware care. Fluent in English and Spanish, he strives to make mental health care accessible and comfortable for a diverse range of patients.
Through comprehensive evaluations, medication management, and evidence-based therapeutic approaches, Oscar works collaboratively with patients to create treatment plans that feel realistic, sustainable, and aligned with their lives. His goal is not only to address symptoms, but to help patients build long-term clarity, resilience, and a stronger sense of self.
Practice Areas
Focus Areas
and Expertise
Anxiety
Support for persistent worry, overthinking, panic, and stress that interfere with daily life. We focus on helping you feel more grounded, in control, and able to navigate challenges with clarity.
ADHD
Evaluation and treatment for focus, attention, and executive functioning challenges. We take a personalized approach to help you improve structure, clarity, and daily functioning.
Depression
Care for low mood, loss of motivation, fatigue, and feeling disconnected from yourself or others. Our goal is to help you regain stability, energy, and a sense of direction.
Mood & Emotional Regulation
Support for mood swings, irritability, and difficulty managing emotions. We work with you to build awareness, balance, and more consistent emotional stability.
Our Philosohy
We believe mental health care should feel different. More human, more intentional, and less rushed. At Lunara, we take the time to understand who you are, not just what you’re experiencing, so your care feels aligned with your life instead of overwhelming.
This is a space where you can slow down, feel understood, and begin to move forward with clarity, confidence, and support.