 The overarching goal of this UH2-UH3 proposal is to work with the NIH Health Care Systems Research Collaboratory to develop and implement a large scale, cluster randomized pragmatic clinical trial demonstration project that directly informs national trauma care system policy targeting injured patients with presentations of Posttraumatic Stress Disorder PTSD and related comorbidity. Each year in the United States US, over 30 million individuals present to trauma centers, emergency departments, and other acute care medical settings for the treatment of physical injuries. Multiple chronic conditions including enduring PTSD, alcohol and drug use problems, depression and associated suicidal ideation, pain and somatic symptom amplification, and chronic medical conditions e.g., hypertension, coronary artery disease, diabetes, and pulmonary diseases are endemic among physical trauma survivors with and without traumatic brain injuries TBI. Evidence-based, collaborative carecare management treatment models for PTSD and related comorbidities exist. These care management models have the potential to be flexibly implemented in order to prevent the development of chronic PTSD and depressive symptoms, alcohol use problems, and enduring physical disability in survivors of both TBI and non-TBI injuries; care management models may also be effective in mitigating the impact of the acute injury event on symptom exacerbations in the large subpopulation of injury survivors who already carry a substantial pre-injury burden of multiple chronic medical conditions. 