California Drug Rehab Facilities, Effective addiction recovery often requires Dual-Diagnosis therapy for both the addiction itself and mental illness underlying and triggering or being the underlying cause of one’s addiction. Reaching out for help can be the hardest part of getting the treatment you need. While no single treatment modality works for everyone with a Dual Diagnosis, our specialists know what to look for and how to treat clients on their path to recovery. According to SAMHSA's National Drug Use and Health Survey, about 9.5 million Americans had both a mental illness and SUD in 2019 (according to SAMHSA’s National Drug Use and Health Survey).