Dual diagnosis treatment centers provide treatment to people with dual diagnosis. People that have dual diagnosis have mental disorders coupled with substance abuse problems. Dual diagnosis doctors combine therapy for both disorders. This really is just because that both disorders are closely linked. However doctor must identify the underling problem in an attempt to suggest a specific treatment plan or therapy. Identifying if the primary problem is drug use or possibly a mental disorder could be a daunting task. However, there are numerous ways whereby the physician can identify the main problem. First off, problems may follow diagnostic guidelines.