Patients were recruited via mailings and advertising flyers; those with chart-documented musculoskeletal pain diagnoses who reported at least moderate pain severity and pain-related function (Chronic Pain Grade [CPG]) lasting at least 12 weeks were invited to participate. Participants completed questionnaires at baseline, 3, 6 and 12 months, with a subset re-assessed at 30 months. Primary outcomes were Roland-Morris Disability scores and CPG pain intensity scale scores over 12 months. Depression was assessed using Patient Health Questionnaire 9 [PHQ-9] scores. Intervention effects on patient outcome variables were tested using intention-to-treat analyses with multilevel models; patient-level covariates of age, sex, baseline depression severity, baseline opioid status (yes/no), and medical morbidity were included. To quantify provider adherence to pain treatment guidelines, we created the Pain Process Measure (PPM), a chart review checklist. Clinicians completed a baseline 23-item survey of attitudes and behaviors related to chronic pain management, job satisfaction, and satisfaction with local pain resources. Patient satisfaction measures included patient-rated global impression of change, global VA health care satisfaction, health-related quality of life, and receipt and rating of effectiveness of VA chronic pain treatment. Pain disability-free days were calculated from Roland-Morris Disability Questionnaire scores. Data on VA treatment costs were obtained from the VA's Decision Support System for all utilization except certain intervention activities that were tracked in a separate study database.