Clinical Modification
ICD-10-CM 2026
The essential clinical index for diagnostic coding in the United States. Browse all 98,186 codes across 22 chapters with official 2026 fiscal year updates.
Understanding ICD-10-CM
What is ICD-10-CM?
The Clinical Modification of ICD-10 is the official system used in the United States to report diagnoses across all healthcare settings.
Code Structure
Codes are between 3 and 7 characters long. The first 3 characters represent the category, followed by a decimal and up to 4 characters for clinical specificity.
Billable Specificity
Only codes at their highest level of specificity are Billable. Non-billable codes are categories that require more detail for accurate reporting.
2026 Fiscal Year
This index incorporates the latest FY2026 updates, including new diagnostic codes and refined clinical definitions for accurate documentation.