USCIS POLICY MANUAL, Chap. 8, section A (The civil surgeon must now make this determination [of whether drug abuse or addiction is shown for purposes of inadmissibility] according to the [CDCs] Diagnostic and Statistical Manual of Mental Disorders (DSM) as specified in the Technical Instructions. http://www.uscis.gov/policymanual/HTML/PolicyManual-Volume8-PartB-Chapte... The Technical Instructions are available at http://www.cdc.gov/immigrantrefugeehealth/exams/ti/civil/mental-civil-te....