Article Overview

This coding guidance article explains how a specific electrodiagnostic testing service is reported in a single encounter and addresses questions about whether it is billed once, by nerve, or by side. It is aimed at coders, billers, and clinical documentation staff who need to understand encounter-level reporting for a neurophysiology service and the related use of a reduced-services modifier. The article focuses on the billing context, laterality considerations, and common reporting confusion around the service.