Bipolar disorder therapists & psychiatrists in Valencia, CA

Hi, I’m Tina Chen, a Psychiatric Mental Health Nurse Practitioner dedicated to helping clients feel their best. I specialize in treating depression, anxiety, and ADHD, and I combine medication management with practical tools from CBT and positive psychology. With advanced training from California Baptist University and National University, I focus on creating a supportive, collaborative space where you can build confidence, resilience, and balance in your everyday life.

I am a clinical psychologist working in San Diego, with over 20 years of experience. I earned a BA in Psychology from University of California Santa Barbara, and a Ph.D. in Clinical Psychology from Alliant International University (formerly California School of Professional Psychology). I completed a postdoctoral fellowship in substance use disorders at the San Diego Veteran's Affairs Healthcare System. I have expertise in working with depression, anxiety, mood disorders, substance use problems, relationship issues, and assertiveness. I also conduct psychological testing for questions around ADHD, Autism, mood disorders, giftedness, learning problems, and personality issues, among others. I believe psychotherapy is a collaborative process to help clients understand themselves better, achieve goals, and become one's best self.

• Outstanding Patient Reviews - Google reviews (Access Psych Meds)
• Experienced Mental Health Provider (13 years) assisting clients with ADHD (adult) Anxiety Depression Chronic Pain Chronic Sleep problems Mood disorder PTSD: Military combat, childhood & sexual trauma Alcohol Use Disorder
• Dual Master’s Prepared
• ANCC Dual Board Certified - Psych Mental Health Nurse Practitioner and Clinical Nurse Specialist
• Veteran 22 yrs retired US Navy Commander/O-5
• Licensed in 5 States - AZ, CA, OR, MD, WA

I know how heavy life can feel when you’re carrying pain, uncertainty, or self-doubt. But I believe, as a wise old wizard once said, “Happiness can be found even in the darkest of places, if one only remembers to turn on the light.” My role is to help you find that light again. I work with Gen Z and Millennial adults facing anxiety, depression, trauma, bipolar disorder, ADHD, and more. Through integrative, culturally responsive care, I combine evidence-based psychiatry with holistic strategies to help you feel heard, supported, and empowered to create a life that aligns with your true self.

Welcome! I’m Marissa Brooks, a Licensed Clinical Social Worker with years of experience working in the mental health field. Throughout my career, I have worked in a variety of treatment settings, including crisis residential programs and outpatient mental health services. I hold a Bachelor’s degree in Psychology with an emphasis in Criminal Law and Behavior, as well as a Master’s degree in Social Work. I specialize in working with adults experiencing anxiety, depression, life transitions, and stress management.

IMPORTANT: For current availability, visit https://mentalhealthpractitioners.com/ or call/text us anytime at 415-968-6515—we make it super easy! Intake forms are required before your first appointment and will be emailed to you when you book online. Please be sure to send us a picture of your insurance information and photo ID!

I'm Stephanie Patrick-Calvillo, a Board-Certified Psychiatric Mental Health Nurse Practitioner who believes mental health care should be accessible, compassionate, and tailored to each individual. Over the past 15+ years, I've worked with diverse populations—from adolescents facing their first mental health crisis to adults navigating complex psychiatric conditions, and seniors experiencing cognitive and emotional challenges.

My practice is grounded in the belief that effective treatment goes beyond symptom management. I take time to understand your unique story, your strengths, and the factors that shape your mental health. Whether you're dealing with a new diagnosis or have been managing symptoms for years, I meet you where you are with respect and without judgment.

I specialize in treating mood disorders, anxiety, psychotic disorders, personality disorders, substance use concerns, and behavioral issues related to dementia. I've completed advanced certification training because I'm committed to staying current with evidence-based treatments—ensuring you receive care that reflects the latest research.

Beyond clinical work, I'm passionate about mentoring the next generation of healthcare providers. I've mentored nursing and nurse practitioner students from multiple universities, which keeps me grounded and reminds me why this work matters.

When you work with me, you're getting someone who genuinely cares, who's seen mental health challenges from many angles, and who believes deeply in your capacity for healing and growth.

I bring a wealth of experience from my work in child welfare for nearly 10 years, which has shaped me into a deeply trauma-informed practitioner. Over the years, I have supported clients of all ages and walks of life, including individuals facing complex socioeconomic stressors and diverse life circumstances. I am comfortable working with a wide range of mental health concerns, from mood disorders like anxiety and depression to more complex personality-based struggles. No matter your background or the challenge you are facing, I offer a stable, professional, and non-judgmental presence designed to help you process your experiences and move toward a healthier future.

I believe that therapy is a partnership, and my goal is to provide a safe, non-judgmental space where you feel truly heard. As a licensed clinical social worker, I specialize in supporting individuals as they navigate life’s transitions, stress, and anxiety. My approach is rooted in compassion and evidence-based practices, primarily utilizing Cognitive Behavioral Therapy (CBT) and a client-centered perspective to help you develop practical tools for your daily life. I am dedicated to working alongside you to build on your existing strengths, foster resilience, and help you create the change you are seeking. You don’t have to navigate these challenges alone; I invite you to reach out so we can start this work together.