Beginning January 1, 2021, there will be significant changes to Evaluation and Management (E&M) codes for office and outpatient visits. History and exam will no longer determine the code level, which will instead be based on medical decision making or total time spent on the encounter. A new prolonged services code has also been added to report additional time beyond a level 5 E&M code. Practices must understand the modifications to ensure proper coding and reimbursement starting in 2021.