Put simply, a CDS has to make sure all the information gathered and recorded is accurate and detailed. They may go through every piece of paper and every line of medical code for each patient's case. When it seems like information is missing, or there is conflicting data, it's often up to a CDS to fill in the blanks. These situations require the CDS to communicate with various departments to make sure a patient's records are as accurate and in-depth as possible.