Datasets are published quarterly by DoH to accompany their waiting times bulletins, for Emergency care, outpatients, inpatient and day cases, cancer, and diagnostic. The data covers back to 2008, and are in a readily useable and machine-readable format.
As with other DoH publications, these are licensed under OGL, so would be a quick win to include the latest published datasets on OpenDataNI and keep them updated. I realise that the Inpatients dataset is already published, it would be useful to add the other groupings to this portal.
As an additional ask, as part of the emergency care bulletin, more data than that currently published (which covers monthly waiting times breakdowns by hospital) could be published. For instance, data on attendances by age-groups, gender, nature of injury/complaint, attendances and waiting times by date/time of day, triage times, admissions to hospital etc. are kept but don't form part of the currently published datasets.