Substance Use Therapists If you're looking for help with substance abuse in Williamstown or for Williamstown substance abuse counseling, these professionals provide substance abuse services and substance abuse treatment. They include substance abuse therapists in Williamstown, substance abuse psychologists and substance abuse counselors. They can help with drug addiction and drug abuse treatment in Williamstown, alcohol addiction, chemical dependency and substance abuse recovery. An Williamstown substance abuse therapist provides outpatient services but can also refer to treatment centers, clinics, rehab, treatment programs and substance abuse rehabs.