Any help would be greatly appreciated. If a patient is seen and the provider orders 4 lab tests and documents 2 diagnosis for the visit. Lets say 2 of the labs pay and 2 deny due to non covered diagnosis. If the patient was previously seen (say with in the previous 30 days) and there is a documented diagnosis in the chart for a diagnosis that would be payable for the denied labs, can we change / add the previous diagnosis to the denied labs? This is the current policy in my office however I am having a difficult time finding documentation to support or not support this practice.