METHODS: Using EMR sources, a retrospective analysis of patients admitted to a tertiary care center was done. A total of 1582 patients underwent liver transplant surgery from March 17, 1999 through January 15, 2016. All ages of patients were included. Using a derivation cohort of 100 patients, several iterations of a free-text electronic search were developed and refined for dialysis, but using procedure codes for the search was found to be more reliable than free-text. Subsequently, the automated search algorithm was validated on an independent cohort of 100 patients. The sensitivity and specificities were compared with the results of comprehensive manual medical records review (reference standard) for dialysis.