Experience with capturing AdverseEvent has been limited and suggests that clinical systems generally avoid identifying a category/class of adverse events. Instead, most organizations have a separate risk management system that captures adverse events of healthcare as part of a legal/risk management process. Specific events can still be identified as findings or conditions (e.g., fall, injury, fracture) and causative agents probably best identified with ICD-10 codes (e.g., fracture due to xxx). Thus, the measure expression can more likely capture what might be an adverse event by identifying a new observation or condition (e.g., fracture) with onsetDate after admission (for hospital admissions) or initiating at the time or after a procedure (inpatient or ambulatory).  Continuing AdverseEvent in eCQMs, dQMs, and CDS artifacts is likely adding burden to implementers and provider systems until such time as USCDI includes a requirement to capture and share Adverse Events with interoperable messages.