This is an abbreviation for grouper concept.
A concept definition that provides a definition for subtypes that are always and necessarily true.
The grouper concept must be sufficiently defined and clinically useful for the purpose of organizing content for an intensional reference set or in expression constraint language (ECL).
An intensional reference set: disease of colon and all of its descendants
Expression constraint language (ECL): 128524007 |Disorder of colon (disorder)|
Grouper