Post-traumatic Stress Disorder (PTSD) is the 6th most common disability among veterans. To qualify for VA disability benefits, veterans must prove their PTSD is service-related. VA's disability rating is determined by symptom severity, and it's crucial that PTSD symptoms are accurately represented in medical records. The VA uses both the DSM-V and their rating formula to evaluate claims. While PTSD ratings range from 0% to 100%, it's key to note that ratings should reflect the highest symptom severity, not an average. Veterans must provide a current PTSD diagnosis, evidence of an in-service stressor, and a link between the two for a successful claim. Mistakes in rating decisions are common, making legal representation advisable for some.