Look within for new ICD-10-CM guidelines on ‘with’ and ‘in’

Why This Topic Matters

The update affects how coders interpret relationships between conditions, apply chapter-specific instructions, and recognize when guideline language changes supersede older assumptions. It also highlights several areas where reporting rules were revised, making it important for accurate diagnosis coding and compliance.

Article Sections

1. ICD-10-CM convention update on relational terms

   Introduces a change in how the coding conventions address relational wording and when assumptions should be made from documentation or code structure. It also references the 2018 guideline update and its effective date.

2. Chapter-specific guideline changes

   Summarizes several chapter-level revisions across common diagnosis coding topics, including diabetes, substance use, radiation therapy, myocardial infarction, chronic ulcers, fractures, post-abortion conditions, and Z code categories.