Browse ICD-10-CM Codes by Chapter

All 22 chapters of FY2026 ICD-10-CM diagnosis codes. Click any chapter to explore codes, or search by code or condition name. Each chapter contains the official codes published by the U.S. Centers for Medicare & Medicaid Services (CMS) and the National Center for Health Statistics (NCHS), updated automatically every October 1 when CMS releases new fiscal year files.

Codes include billable status, official long descriptions, chapter classification, and related codes — everything a medical coder or billing professional needs to verify a diagnosis code before claims submission.