PDGM implementation is a mere 42 weeks away and is anticipated to be the biggest change in home health payment reform in over 20 years. HHAs will need to completely revise care management and billing processes, as well as documentation and coding practices, in order to make the transition successfully. One of the most dramatic areas of change relates to ICD-10 coding, which is a significant determinant of revenue in the new paradigm. Both timing and accuracy of ICD-10 Coding (primary diagnosis and comorbidities) will play a role in how patients are grouped and, ultimately, reimbursed. Given that this is a completely new core competency for HHAs, it is prudent to take action today to assess related risk and begin to identify the changes that will need to occur in order to minimize transition risk.