This case-sensitive code system http://terminology.hl7.org/CodeSystem/condition-ver-status defines the following codes in an undefined heirarchy:

LvlCodeDisplayDefinition
1unconfirmed UnconfirmedThere is not sufficient evidence to assert the presence of the subject's condition.
2  provisional ProvisionalThis is a tentative diagnosis - still a candidate that is under consideration.
2  differential DifferentialOne of a set of potential (and typically mutually exclusive) diagnoses asserted to further guide the diagnostic process and preliminary treatment.
1confirmed ConfirmedThere is sufficient evidence to assert the presence of the subject's condition.
1refuted RefutedThis condition has been ruled out by subsequent diagnostic and clinical evidence.
1entered-in-error Entered in ErrorThe statement was entered in error and is not valid.
 <status value="draft"/> <experimental value="false"/> <date value="2020-04-09T21:10:28+00:00"/> <publisher value="Health Level Seven International"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org"/> </telecom> <telecom> <system value="email"/> <value value="hq@HL7.org"/> </telecom> </contact> <description value="The verification status to support or decline the clinical status of the condition or diagnosis."/> <copyright value="This material derives from the HL7 Terminology (THO). THO is copyright ©1989+ Health Level Seven International and is made available under the CC0 designation. For more licensing information see: https://terminology.hl7.org/license"/> <caseSensitive value="true"/> <valueSet value="http://terminology.hl7.org/ValueSet/condition-ver-status"/> <content value="complete"/> <concept> <code value="unconfirmed"/> <display value="Unconfirmed"/> <definition value="There is not sufficient evidence to assert the presence of the subject's condition."/> <concept> <code value="provisional"/> <display value="Provisional"/> <definition value="This is a tentative diagnosis - still a candidate that is under consideration."/> </concept> <concept> <code value="differential"/> <display value="Differential"/> <definition value="One of a set of potential (and typically mutually exclusive) diagnoses asserted to further guide the diagnostic process and preliminary treatment."/> </concept> </concept> <concept> <code value="confirmed"/> <display value="Confirmed"/> <definition value="There is sufficient evidence to assert the presence of the subject's condition."/> </concept> <concept> <code value="refuted"/> <display value="Refuted"/> <definition value="This condition has been ruled out by subsequent diagnostic and clinical evidence."/> </concept> <concept> <code value="entered-in-error"/> <display value="Entered in Error"/> <definition value="The statement was entered in error and is not valid."/> </concept> </CodeSystem>