Changes to the ICD-10-CM Official Guidelines for Coding and Reporting

Why This Topic Matters

Updates to the official ICD-10-CM guidance affect code assignment consistency, documentation review, and reporting practices across inpatient and outpatient settings. Knowing which sections were modified helps users focus on the parts of the guidelines most relevant to their work.

Article Sections

1. Section I. Conventions, general coding guidelines and chapter specific guidelines

   Introduces changes within the foundational ICD-10-CM guidance structure, including general conventions and chapter-specific instructions. This section frames how later chapter updates are organized.

2. A. Conventions for the ICD-10-CM

   Covers revisions related to core ICD-10-CM conventions used throughout the guidelines. The content addresses general interpretation rules and note types used in the classification.

3. B. General Coding Guidelines

   Summarizes updates to broad coding principles that apply across diagnoses and settings. The section focuses on general sequencing and multiple-coding concepts.

4. C. Chapter Specific Coding Guidelines

   Provides chapter-by-chapter guidance updates for selected diagnosis categories. The section covers several body systems, conditions, and encounter types.

5. Section II. Selection of Principal Diagnosis

   Addresses guidance for determining the principal diagnosis in selected circumstances. The content includes rehabilitation-related reporting considerations.

6. Section IV. Diagnostic Coding and Reporting Guidelines for Outpatient Services

   Summarizes outpatient reporting guidance related to encounter coding and abnormal findings. This section highlights how examination encounters are classified.

7. Appendix I. Present on Admission Reporting Guidelines

   Explains present-on-admission reporting guidance and where to find exempt conditions. The content is oriented toward inpatient reporting processes.