Assignment task: Ambulatory Payment Classifications (APCs) Overview This project is designed to help you become familiar with Ambulatory Payment Classification (APCs) and compare them to Relative Value Units (RVUs). We have looked at the RBRVS/GPCI system in previous projects. This is how physicians are paid for their work according to the CPT code for the service. APCs are how the ambulatory facility is paid. It is part of the Hospital Outpatient Prospective System (HOPPS), used for Medicare payments to outpatient clinics, emergency department services and observation services, outpatient testing and therapy services. The payments are made in units called APC groups (much like the RBRVS system pays in RVUs). Need Assignment Help?