Dual Diagnosis Treatment in California

Medically reviewed by Bradley Tourtlotte, MD · Written by the California Treatment Centers clinical team · Last reviewed June 2026

For many people, addiction and mental illness are deeply intertwined. Anxiety, depression, trauma, or bipolar disorder can fuel substance use, and substance use can worsen mental-health symptoms, creating a cycle that's hard to break. At California Treatment Centers, our dual diagnosis programs treat both at once, because lasting recovery rarely comes from addressing only one. We serve clients statewide from multiple California locations.

What Is Dual Diagnosis?

Dual diagnosis, also called co-occurring disorders, describes the presence of both a substance use disorder and a mental-health condition at the same time. This is common, not unusual. When the two go untreated together, treating just the addiction often leaves the underlying pain in place, and treating just the mental health leaves the substance use to undermine progress.

Common Co-Occurring Conditions

• Depression and persistent low mood
• Anxiety disorders and panic disorder
• Post-traumatic stress disorder (PTSD) and trauma histories
• Bipolar disorder
• ADHD
• Obsessive-compulsive disorder and other conditions

Signs You May Benefit From Dual Diagnosis Care

• Using substances to cope with anxiety, sadness, or painful memories
• Mental-health symptoms that worsen when you use, or when you stop
• Relapsing after treatment that addressed only the addiction
• Feeling that something deeper is driving the substance use

Why Integrated Treatment Works Better

Decades of clinical experience show that integrated care, treating both conditions together with one coordinated team, leads to better outcomes than treating them separately or in sequence. When your therapists and medical providers understand the full picture, they can tailor therapy and any medications to support both your recovery and your mental health.

How We Treat Co-Occurring Disorders

Care often begins with medical detox when a substance requires it, then continues through residential treatment and outpatient treatment. Throughout, we use evidence-based approaches such as cognitive behavioral therapy, dialectical behavior therapy, trauma-informed care, and psychiatric support. When medication is part of the plan, our providers coordinate it carefully alongside therapy.

Compassionate, Coordinated Care

You are not your diagnosis, and you are not alone. Our team treats the whole person with respect and without judgment, building a plan around your goals, your history, and your strengths.

Getting Started

We are in-network with most major insurers, and insurance verification is free and confidential. Our admissions team can help you understand your options and find the right level of care. Reach out today, and let our coordinated team help you treat both the addiction and the mental-health condition behind it, so recovery finally has a foundation that holds.

If you or someone you love is in crisis, call or text 988. The free SAMHSA National Helpline at 1-800-662-4357 is available 24/7.