Identification and analysis of copied and pasted passages in medical documents

This disclosure describes systems, devices, and techniques for identifying and analyzing copied and pasted passages of medical documents. In one example, a computer-implemented method includes receiving, by a computing device, a second medical document related to a patient encounter and determining, by the computing device, that a passage of the second medical document has been copied from a first medical document. The method may also include determining, by the computing device, a risk level for the passage, the risk level indicating a likelihood that the passage includes inaccurate information regarding the patient encounter, determining, by the computing device, that the risk level exceeds a risk threshold, and outputting, by the computing device, an indication of the passage for which the risk level exceeds the risk threshold.