Lygrisse K, Roof MA, Keitel L, et al. - Via this study, researchers investigated the accuracy of ICD-10-PCS coding for revision total hip arthroplasties (rTHA) and discussed the implications on registry data. They retrospectively reviewed rTHA databases at two large, academic medical centers and identified 895 cases of rTHA between October 1, 2015 and July 3, 2019. Analysis revealed that the percent of correctly coded rTHA was low. At least one American Joint Replacement Registry (AJRR) trigger code was noted in all rTHA procedures so a rTHA would have been appropriately captured by AJRR. However, these inaccuracies should make one pause when employing ICD-10-PCS procedural data to try to examine specific rTHA details from administrative claims databases and ward against expanding ICD-10-PCS as a means to gather implant survival and registry data.