Service Related Groups (SRGs) and Enhanced Service Related Groups (ESRGs) have been used in NSW since the early 1990s and were adopted nationally stating from the late 1990s. SRGs reflect clinical specialties, while ESRGs provide more detail of major conditions and procedures within the specialty groups. These classifications provide the NSW health system with robust tools for planning, funding and other strategic initiatives. Members of HPA were part of the team that initially developed these classifications whilst working for the NSW Department of Health.
HPA has been engaged on several occasions to update SRGs and ESRGs to reflect changes in clinical practice and patterns of morbidity amongst the population.