Agree with the submitter that the sentence is broader than just typical admission/discharge scenarios, though this nomenclature is easier to use than "begin encounter" and "end encounter" notifications and the main focus is on more severe encounters (inpatient, ER, surgery etc.); implementers may consider the use this IG for other types of encounters, where appropriate. we will clarify : The intent of this use case is to focus on the beginning and end of following types of Encounters. Note that this is not a complete list (it is based on admit reason ( http://build.fhir.org/v3/ActEncounterCode/vs.html ) / discharge disposition value set ( http://build.fhir.org/valueset-encounter-discharge-disposition.html )) admission to the emergency department admission to a hospital or equivalent facility as an inpatient admission to to a health care facility for a predetermined length of time, usually less than 24 hours admission to a hospital or equivalent facility for observation admission to a healthcare facility on a nonresident basis for example, for an outpatient medical procedure or surgery notification about a discharge to the patient's home environment notification about a discharge to a long-term care facility notification about a discharge to a post-acute care rehabilitation facility notification that the patient expired during the encounter