Find medical errors for Indiana hospitals and ambulatory surgery centers in 2018. The Indiana Medical Error Reporting System (MERS) final report summarizes 134 reportable events in hospitals and outpatient surgery centers in 2018. Eight (8) of 134 events occurred at ambulatory surgery centers. Adverse Events such as leaving a foreign object inside a patient after surgery, operating on the wrong body part, (remarkably, these avoidable surgical errors still happen) or Stage 3 or 4 pressure ulcers (bedsores) acquired after admission, are based on NQF’s list of 28 serious, largely preventable adverse events. List of events by facility name is a separate 285-page pdf file called Data Tables. IU Health and St. Vincent in Indianapolis, Methodist in Gary, Reid in Richmond, and St. Joseph in Ft. Wayne, IN had the greatest number of adverse reportable events in 2018. Market share data included. Published by IN State Dept. of Health (ISDH, in.gov) December 2019.