A generic Scheduling API for use across Health and Social Care. This includes the process of finding free Slots and booking Appointments into those Slots.
This was previously called FHIR-A2SI-APPOINTMENTS-API it has been renamed to emphasise that it is not specific to A2SI, and is a more general scheduling API.
The initial scope that this API is being used in is NHS 111 to Urgent Treatment Centres, however the FHIR resources etc are being designed in such a way as to make them reusable across as wide a scope as is possible.
GP Connect Appointment Management NHS e-Referral Service which has several APIs listed here