Answer;
-Unlisted code
Step-by-step explanation;
-When a code does not exist that accurately describes the procedure or treatment, the coder should report an unlisted code.
-Unlike other CPT codes, unlisted codes do not describe a specific procedure or service. Relative value units are not assigned to unlisted codes because the codes do not identify usual procedural components or the effort/skill required for the service.
-Therefore; When using an unlisted code it is necessary to provide specific information regarding the procedure(s) identified by the code.