Q&A: Appropriate use of modifier -91 for repeat laboratory testing

Article Overview

This short Q&A addresses repeat laboratory testing and the use of CPT modifier -91 in the context of NCCI edits. It is aimed at coders, billers, and compliance staff who handle laboratory claims and need to understand the general scope of guidance discussed in the article. The piece also notes that the discussion is based on a webinar answer and emphasizes reviewing the full documentation for each individual case.