In July 2008, a condition-onset flag was added to the ICD-10-AM specification, allowing hospital-acquired complications to be differentiated from comorbidities present on admission in routinely coded administrative data.

To help analyse this flag, the Australian Centre for Economic Research on Health (under sponsorship by the Australian Commission on Safety and Quality in Health Care) developed a classification system to provide a meaningful way of grouping complications into 17 classes and 145 subclasses. This is known as the Classification of Hospital Acquired Diagnoses (CHADx).

We have expert knowledge on the CHADx specification, its use, and technical implementation. We can advise you on the best way to start reporting with CHADx, and its suitability for different purposes. We can also tailor an implementation to your specific needs and casemix in order to overcome some of the limitations of the original specification.

Please contact us to find out how we can help you today.


Please note that the Commission’s CHADx webpage is no longer available, however a copy can be found on¬†for historical reference.