of service connection for PTSD . First , the record demonstrates the Veteran served in Vietnam , and the RO conceded that the Veteran ' s in - service stressors occurred . Second , the Veteran ' s VA treating physicians believe the Veteran suffers from PTSD . For more than the past decade , the Veteran has complained of and sought treatment for PTSD , and the providers whom the Veteran saw on a daily basis concluded the Veteran suffered from PTSD . Last , the October 2002 C & P examiner diagnosed the Veteran with PTSD and concluded that the Veteran ' s PTSD stemmed from his service in the military . In March 2012 , the Veteran underwent a C & P examination for PTSD