The second condition or complaint coexisting with the principal diagnosis during a patient's stay in the emergency department/service, as represented by a code.
Emergency department care
A valid 10th edition code from the Corporate Reference Data System (CRDS) ICD-10-AM data set maintained by Statistical Standards and Strategies, Statistical Services Branch (SSB).
Additional diagnoses give information on the conditions that are significant in terms of treatment required, investigations needed and resources used during the emergency department stay.
Emergency Data Collection (EDC):
Data element is a valid ICD-10-AM 10th edition code or blank.
Implementation in Metadata Sets
AD; Additional diagnosis; Diagnosis; ICD-10-AM codes