CMS Releases 2026 Midyear Final ICD-10-CM Mapping

The Centers for Medicare & Medicaid Services (CMS) has officially published the 2026 Midyear Final ICD-10-CM → HCC V28 mapping, effective for dates of service October 1, 2025 through September 30, 2026.

This update is essential for Primary Care teams working in risk adjustment, coding, and compliance.

Why This Matters for Risk Adjustment

- Accurate mapping = accurate HCC capture and RAF scores

- Outdated codes = unsupported HCCs and potential denials

- Timely updates = audit readiness and financial stability

With V28’s tighter clinical specificity and reduced code set, staying current is no longer optional — it’s foundational.

Action Steps for Primary Care Teams

- Review the CMS 2026 ICD-10-CM Mapping files (cms.gov)

- Update coding tools and workflows before October 1, 2025

- Educate providers on new codes and documentation requirements

- Reconcile problem lists and chronic conditions using the updated mappings

- Collaborate with coders and compliance teams to ensure defensible documentation

Bottom line: The 2026 ICD-10-CM mappings are more than a technical update — they’re a roadmap for compliant, accurate, and audit-ready risk adjustment in the V28 era.