Current Version - Under Revision
Historical Association reference sets provide links between inactive concepts and their active replacements or equivalents. There is one Historical Association reference set for each type of historical association as shown in Table 4.2.3-1.
Id | Term
Applies to a concept that is ambiguous. The targetComponent is an active concept that represents one of the possible meanings of the inactive concept. Multiple rows are used to refer to each of the possible meanings of the ambiguous concept.
Previously referred to as "MAY BE A".
Applies to a component that has been moved to (or are pending a move to) another namespace. The targetComponent identifies the target namespace (not the new component).
Applies to a component that has been moved to this namespace from another namespace. The targetComponent identifies the original component identifier in its previous namespace.
Applies to an erroneous, obsolete and other inactive component for which there is a single active replacement. The targetComponent identifies the active component that replaces this component.
Applies to a component that is a duplicate. The targetComponent identifies the active component that this component duplicates.
Links an inactive classification concept, including "not otherwise specified" or "otherwise specified" with the active concept that was formerly its most proximal supertype.
(not used currently)
Links an inactive classification concept derived from ICD-9 Chapter XVI 'Symptoms signs and ill-defined conditions' with the most similar active concept.
Applies to an inactive description which is inappropriate to the concept it is directly linked to but instead should refer to the concept referenced by the targetComponent.