This document provides guidance and tools for medical practices to assess the impact of transitioning from ICD-9 to ICD-10 coding. It instructs users to identify current workflows, staff, software, and top codes that use ICD-9. It also has users assess necessary changes to workflows, look up code matches, and evaluate vendor and payer readiness. Finally, it has users plan training, including allocating tasks, training, testing costs, and technology purchases needed to implement ICD-10 by the October 2014 deadline.