How do I know which seventh character to use with sprain and strain codes in ICD-10?

Article Overview

This article explains the topic of seventh-character use in ICD-10 sprain and strain coding and describes how different payer interpretations have been discussed in practice. It also touches on Medicare contractor coverage guidance and the broader question of how coding guidance may align with phases of care. The content is intended for coders, billers, and clinical practices that handle injury diagnosis coding and payer policy questions.