ICD-10-CM External Cause Index · FY 2026 13 Entries
External cause status in the External Cause Index ICD-10-CM
The main term External cause status carries 13 external cause index entries pointing to 5 ICD-10-CM codes. The default entry is Y99.9, the code the bare main term maps to; every indented line below refines the event by vehicle, object, place, or intent. External cause codes are reported after the injury code; verify the 7th character on the code page.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
13
Index Entries
5
Codes Referenced
Y99.9
Default Code
E
Letter
13 of 13 shown
ICD-10-CM
Index Entries Under External cause status 13 entries · 5 codes
External cause status Y99.9
child assisting in compensated work for family Y99.8
civilian activity done for financial or other compensation Y99.0
civilian activity done for income or pay Y99.0
family member assisting in compensated work for other family member Y99.8
hobby not done for income Y99.8
leisure activity Y99.8
military activity Y99.1
off-duty activity of military personnel Y99.8
recreation or sport not for income or while a student Y99.8
specified NEC Y99.8
student activity Y99.8
volunteer activity Y99.2
The info icon previews the code's description and billable status; the code link opens its full page with all notations.
Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM External Cause of Injuries Index release files, effective October 1, 2025 through September 30, 2026.
