May 25, 2021 Not all services that take time in your office are billed per unit. Know the difference between encounter codes and timed codes, but keep documenting your time. OOPS, this page contains content reserved for KMC University members. We’d love to welcome you to the KMC University family because there is an amazing amount of helpful content in the trainings and resources of the KMC University Library. Click here to learn more.