“…health services funding, epidemiology, health sciences research), inaccuracies in data collection have the potential to produce far‐reaching consequences [1]. Inaccuracy in HIPE/Casemix‐based data collection has been reported as high as 26% [1,2], and retrospective re‐evaluations of coding for diagnostic codes have shown inaccurate variations in 20–60% of cases [3,4]. This incorrect audit data has in the past been attributed to incomplete documentation in patient records [5–8], ambiguities in diagnosis classification [9] and deficient coding of co‐morbidities [5,10].…”