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Background Prior to 2016, our hospital used microbiology results alone to investigate surgical site infections (SSI). Previous studies show that this practice can miss as many as half of clinically significant infections. To improve accuracy for fiscal year 2016 SSI surveillance was done by manual chart review of 100% of the surgeries we report to NHSN. While more accurate, this process was time and labor intensive. In May 2016, we began using Epic® ICON as our data mining software. ICON can abstract (create denominator data), determine SSI status (create numerator data) and upload to NSHN. Data indicates that partially automated SSI surveillance reduce manual chart review but our team found that many charts were being reviewed unnecessarily.We developed a computerized algorithm within ICON that would that would capture SSIs but limit the number of charts to be reviewed. Methods Algorithm variables within Epic® ICON were modified to limit data collection to the following parameters: readmission, chief complaint, surgical log, diagnosis, antibiotic administration post 48 hours, and specific microbiology results. We excluded 31 keywords that were part of the Epic® ICON foundation system from our algorithm. For example, we removed the keyword “infection” which flagged whenever “no infection” was charted. The chief complaints grouper was most important as it allowed only meaningful complaints to be considered. Microbiology results were also limited to only include Aerobic, Anaerobic, Fungus, AFB, and wound cultures. To validate the algorithm, it was run retrospectively for fiscal year 2016. Results There was 100% concordance of results comparing SSIs identified using chart review to the use of our computerized algorithm and Table 1 shows the average number of charts requiring review pre and post implementation.Table 1: Comparison of Charts Requiring Review Monthly Average with Chart Review Monthly Average with Computerized Algorithm Improved Efficiency, % BRST 63 27 57 COLO 43 21 52 HYST 38 7 82 HPRO 72 30 59 KPRO 59 27 55 CBGB 30 5 83 Conclusion Careful modification of the ICON foundations system resulted in a 55% decrease overall in the need for chart review without affecting accuracy of reporting. Disclosures All authors: No reported disclosures.

2173. Surgical Site Infection Determination in Epic® ICON: A Utilization Model