Encounter.statusHistory 
The status history permits the encounter resource to contain the status history without needing to read through the historical versions of the resource, or even have the server store them.
= Must Support, = Is Modifier, = QiCore defined extension
| Field | Card. | Type | Description |
|---|---|---|---|
| status | 1..1 | String | planned | arrived | triaged | in-progress | onleave | finished | cancelled +. Binding: Current state of the encounter. (required) |
| period | 1..1 | Interval<DateTime> | The time that the episode was in the specified status. |