2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Mental Disorders 290-319 > Neurotic Disorders, Personality Disorders, And Other Nonpsychotic Mental Disorders 300-316 > Adjustment Reaction 309.* > 2006 ICD-9-CM Diagnosis 309.81 Posttraumatic stress disorder View the most recent version of ICD-9-CM 309.81 A class of traumatic stress disorders with symptoms that last more than one month. There are various forms of post-traumatic stress disorder, depending on the time of onset and the duration of these stress symptoms. In the acute form, the duration of the symptoms is between 1 to 3 months. In the chronic form, symptoms last more than 3 months. With delayed onset, symptoms develop more than 6 months after the traumatic event. 309.81 is a specific code that can be used to specify a diagnosis 309.81 contains 9 index entries View the ICD-9-CM Volume 1 309.* hierarchy Alternate Terminology Chronic posttraumatic stress disorder Concentration camp syndrome Posttraumatic stress disorder NOS 309.81 Excludes acute stress disorder (308.3) posttraumatic brain syndrome: nonpsychotic (310.2) psychotic (293.0-293.9)  Index entries containing 309.81: Disorder - see also Disease post-traumatic stress (PTSD) 309.81 posttraumatic stress 309.81 acute 309.81 brief 309.81 chronic 309.81 stress (see also Reaction, stress, acute) 308.3 posttraumatic acute 309.81 brief 309.81 chronic (motor or vocal) 309.81 Neurosis, neurotic 300.9 posttraumatic (acute) (situational) 309.81 chronic 309.81 Post-Traumatic Stress Disorder (PTSD) 309.81 PTSD (Post-Traumatic Stress Disorder) 309.81