HealthcareService and Patient

Hi - I would like to tie the HealthcareService and Patient together, as to represent that a patient used the service at a given time/date.

Encounter seems like a fit but it does not have a reference to HealthCareService only to Organization.

Any Ideas on how to tie these two together? There is no appointment information available other than the date/time

Certainly it’s Encounter. I think it’s worth asking on FHIR Community why HealthcareService isn’t referenced directly.