Ambulance billing staff should be aware of revisions affecting ambulance billing requirements.  The Change Request (CR) 9761, (revised) manualizes the Calendar Year (CY) 2016 revisions to the ambulance staffing requirements and provides clarifications on the definitions for ground ambulance services for: Advanced Life Support, Level 1 (ALS1), ALS assessment, application for ALS, Level 2 (ALS2), Specialty Care Transport (SCT), Paramedic Intercept (PI), emergency response, and inter-facility transportation.