F43.12 Posttraumatic stress disorder The Criterion A event for PTSD diagnosis is defined as a person who has experienced, witnessed, or was confronted with an event that involved actual or threatened death or serious injury, or a threat to the physical integrity of self or others (Wheeler, 2014). Rates of PTSD are higher among veterans, with some of the highest rates being found among those who were in military combat (American Psychiatric Association, 2013). This client reports that she has experienced two traumatic events since 2012. While in Afghanistan 4 members of her battalion were killed by an IED, and several months later she lost her son when he was 10 days old. According to the DSM-5, the traumatic event can be reexperienced in various ways (American Psychiatric Association, 2013). Commonly, the individual has recurrent, involuntary, and intrusive recollections of the event, considered Criterion B evidence (American Psychiatric Association, 2013). This client reports that she often ruminates about the experience with her first child, and can be overbearing and protective of her 4 year-old daughter. She says this often interferes with her everyday life, as she is too busy worrying about what could happen to her daughter. Intrusive recollections in PTSD are distinguished from depressive rumination in that they apply only to involuntary and intrusive distressing memories (American Psychiatric Association, 2013). The DSM-5 diagnosis of F43.12 PTSD would be appropriate for this client, as she often has distressing thoughts surrounding both traumatic incidents that interfere with her daily life.