A qualifier for each ICD-10-AM code which indicates whether that particular code is for a principal or other diagnosis, procedure, external cause or morphology.
Used for epidemiological research, casemix studies; severity of illness analyses; resource utilisation and planning purposes.
Only one diagnosis may be specified as the principal diagnosis.
Implementation in Metadata Sets
Diagnosis; External cause; ICD-10-AM codes; Morphology; Principal diagnosis; Principal procedure