ConditionVerificationStatus

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

Code	Display	Definition
provisional	Provisional	This is a tentative diagnosis - still a candidate that is under consideration.
differential	Differential	One of a set of potential (and typically mutually exclusive) diagnoses asserted to further guide the diagnostic process and preliminary treatment.
confirmed	Confirmed	There is sufficient diagnostic and/or clinical evidence to treat this as a confirmed condition.
refuted	Refuted	This condition has been ruled out by diagnostic and clinical evidence.
entered-in-error	Entered In Error	The statement was entered in error and is not valid.
unknown	Unknown	The condition status is unknown. Note that "unknown" is a value of last resort and every attempt should be made to provide a meaningful value other than "unknown".