This case-sensitive code system http://fhir.openmrs.org/core/CodeSystem/encounter-type defines the following codes:

Code	Display	Definition
discharge	Discharge	Indicates that a patient's inpatient care at the hospital is ending, and they are expected to leave soon.
admission	Admission	Indicates that the patient has been admitted for inpatient care, and is not expected to leave the hospital unless discharged.
visitNote	Visit Note	Encounter where a full or abbreviated examination is done, usually leading to a presumptive or confirmed diagnosis, recorded by the examining clinician.
checkOut	Check Out	The patient is explicitly leaving the hospital/clinic. (Usually no formal encounter is captured for this.)
checkIn	Check In	Indicates the patient has done the required paperwork and check-in to begin a visit to the clinic/hospital.
transfer	Transfer	Indicates that a patient is being transferred into a different department within the hospital. (Transfers out of the hospital should not use this encounter type.)
vitals	Vitals	For capturing vital signs
attachmentUpload	Attachment Upload	Encounters used to record uploads of attachments.