Allows software vendors to create a change of diagnosis with ACC. The change of diagnosis is a secondary interaction (linked to a Claim) generated for reasons such as patient revisits with new symptoms or the initial provider has referred the patient to a specialist (e.g. xray, physio, surgeon) who diagnoses a more detailed understanding of the injury. From a software vendor perspective this is a subset of the Medical Certificate. From a Provider perspective, making this a separate identifiable service adds considerable value.