The document provides guidance on key documentation elements needed for ICD-10 coding of major emergency department encounters. For injuries, precise location, laterality, and circumstances are needed. Episode of care (initial, subsequent, sequelae) should also be documented. For infections, details like type, location, organism, and complications are important. For medical conditions, specifics on condition, severity, affected body system, signs/symptoms, and findings are required. Proper documentation is crucial for accurate coding and reimbursement under ICD-10.