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

CodeDisplayDefinition
partialPartialSome health information is known and captured, but not complete - see notes for details.
completedCompletedAll available related health information is captured as of the date (and possibly time) when the family member history was taken.
entered-in-errorEntered in errorThis instance should not have been part of this patient's medical record.
health-unknownHealth unknownHealth information for this individual is unavailable/unknown.