

Find mental health support in Mission Viejo with 939 licensed providers ready to meet you in-person or virtually. Headway connects you with empowering, solution-oriented therapists across Laguna Niguel, Aliso Viejo, and nearby communities. Most patients save 75% on sessions through insurance, with many paying as low as $0 per session.
Hello, my name is Alexander Valenzuela PMHNP. I specialize in psychiatric medication management and cognitive behavioral talk therapy. If you're struggling with your mental health and realize you want help, you don't have to do it alone. I am looking forward to starting the journey with you to help achieve your best self.
Mental health has long been treated as the forgotten side of healthcare — and for me, that's exactly why it matters so much. As a Psychiatric Nurse Practitioner serving clients across California through telehealth and in-person care, I specialize in helping people navigate depression, anxiety, and ADD/ADHD. I believe that when mental health struggles go unaddressed, everything else in life suffers — and that healing is not only possible, it's necessary. When I'm not supporting my clients, you'll find me out in nature, getting lost in a good movie, or discovering new music — small reminders of the joy and balance I encourage my clients to find for themselves.
My name is Dianne Fontaine, MSN, APRN, and I'm a Licensed Psychiatric Mental Health Nurse Practitioner, Board Certified (PMHNP-BC) by the American Nurses Credentialing Center (ANCC). I obtained my Master’s Degree from Walden University and has undergone advanced clinical training, equipping me to assess, diagnose, and treat a spectrum of psychiatric illnesses, as well as provide psychotherapy.
With over a decade of acute care experience as a Registered Nurse and a Master’s degree as a Psychiatric Mental
Health Nurse Practitioner, I specialize in treating mood disorders, anxiety, PTSD, neurodiversity, and medication
management.
Hi, I'm Cassie (Cassandra), a board certified Psychiatric Mental Health Nurse Practitioner with over five years of experience in mental health care.
I believe mental health treatment should feel supportive, collaborative, and free of judgment. Every person has a unique story, and I take the time to listen, understand your goals, and create a treatment plan tailored to your individual needs.
I specialize in the treatment of anxiety, depression, ADHD, stress, burnout, sleep concerns, and other common mental health conditions. Through thoughtful psychiatric evaluation and medication management, my goal is to help you find clarity, restore balance, and move forward with confidence.
Whether you are seeking support for the first time or looking for a fresh approach to your mental health care, I strive to provide a comfortable and welcoming space where you feel heard, respected, and supported.
I look forward to partnering with you on your journey toward improved mental wellness and helping you build the tools needed to thrive in everyday life.
I’m here to make this journey feel gentle, welcoming, and human. I keep things clear and simple so you can focus on what matters, not the overwhelm. My style is warm, encouraging, and a little poetic—because softness helps us breathe. Let’s take this step together, one calm moment at a time.


Headway makes it easy to find support for your mental health — from finding the right provider, to understanding costs, to scheduling with ease.
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