This code system http://hl7.org/fhir/request-status defines the following codes:

CodeDisplayDefinition
draftDraftThe request has been created but is not yet complete or ready for action
activeActiveThe request is ready to be acted upon
suspendedSuspendedThe authorization/request to act has been temporarily withdrawn but is expected to resume in the future
cancelledCancelledThe authorization/request to act has been terminated prior to the full completion of the intended actions. No further activity should occur.
completedCompletedActivity against the request has been sufficiently completed to the satisfaction of the requester
entered-in-errorEntered in ErrorThis electronic record should never have existed, though it is possible that real-world decisions were based on it. (If real-world activity has occurred, the status should be "cancelled" rather than "entered-in-error".)
unknownUnknownThe authoring system does not know which of the status values currently applies for this request. Note: This concept is not to be used for "other" . One of the listed statuses is presumed to apply, but the system creating the request doesn't know.