Mental Health Treatment in Orange County
Find stillness. Build Connection. Build Momentum.
Racing thoughts. Persistent worry. A sense of disconnection from yourself and everyone around you. Mental health struggles can feel like living in constant turbulence — and healing begins the moment that turbulence starts to settle.
You are not alone in this:
- More than 1 in 5 U.S. adults will experience a mental illness this year — 59.3 million people (NIMH)
- Only about half ever receive treatment (SAMHSA)
- The average person waits 11 years before asking for help (NIH)
Stillwater Behavioral Health exists to close that gap. We provide evidence-based mental health treatment for adults across Orange County — Partial Hospitalization Program (PHP), Intensive Outpatient Program (IOP), and outpatient therapy — so you can get real support without putting your life on hold.
Find out if your insurance will cover the cost of treatment.
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Signs You May Need Mental Health Treatment in Orange County
- Persistent sadness, hopelessness, or loss of interest in things you used to enjoy
- Anxiety or worry that interferes with work, relationships, or sleep
- Difficulty functioning at home, school, or work
- Increased irritability, isolation, or withdrawal from loved ones
- Intrusive memories, nightmares, or heightened anxiety following a traumatic event
- Mood swings that feel out of your control
- Using substances to cope with emotional pain
You don't need to have it figured out to reach out. A conversation is often the first step.
Levels of Mental Health Care We Offer in Orange County
Every path to healing looks different. That's why we offer three levels of care, and you can move between them as your needs change:
Partial Hospitalization Program (PHP)
Daily, structured support for when you need more than weekly therapy can offer.
Intensive Outpatient Program (IOP)
Multiple days a week, built to fit around work, school, or family.
Outpatient Program
Ongoing individual and group therapy, ideal for step-down care or lower-acuity support.
Conditions We Treat
Depression · Anxiety disorders · PTSD and trauma · Bipolar disorder · OCD · ADHD · Panic disorder · Grief and complex grief · Borderline Personality Disorder (BPD) · Co-occurring disorders
What to Expect When You Reach Out
A confidential phone call to discuss what you're experiencing
A free, no-obligation insurance verification
A brief clinical assessment to determine the right level of care
A personalized treatment plan and admission date
Why Choose Stillwater Behavioral Health in Costa Mesa
- Centrally located in Costa Mesa, serving all of Orange County — Newport Beach, Irvine, Huntington Beach, and beyond
- Evidence-based therapies including CBT, DBT, and EMDR
- Individualized treatment plans built around your goals, not a fixed curriculum
- Multiple levels of care under one roof, so you don't have to switch providers as your needs change
- A supportive, judgment-free environment focused on real, sustainable healing
Frequently Asked Questions
What's the difference between PHP and IOP?
PHP is more intensive and typically daily. IOP meets fewer days per week and fewer hours per day, making it easier to balance with work or school.
How do I know which program is right for me?
Our clinical team completes a brief assessment during your first call to recommend the right level of care.
Is treatment confidential?
Yes. All communications and treatment records are protected under HIPAA and applicable California confidentiality laws.