The use of a 'Present on Admission' (or POA) indicator to distinguish pre-existing or co-morbid conditions from those arising during the episode of care has been advocated in the US for many years as a tool to support quality assurance activities and improve the accuracy of risk adjustment ...
Using all ICD-9-CM injury diagnosis codes (800-999) and the present-on-admission indicator, we identified incident inpatient injuries among non-delivery hospital discharges. A clinical expert panel was asked to identify injuries unlikely to have occurred during the hospitalization; these were ...