Abstract: In an embodiment, a computer-implemented method predicts a related symptom. In the method, the EHR system determines a plurality of mapping entries to build a predictive model. Each mapping entry specifies a correlation between a first symptom and a second symptom in at least one patient encounter note. After building the predictive model, the EHR system receives a reported symptom. Then, the EHR system selects which of the plurality of mapping entries corresponds to the reported symptom to generate a related symptom. The selected mapping entry correlates the related symptom with the reported symptom.