ICD-10-CM External Cause Index · FY 2026 14 Entries
Heat in the External Cause Index ICD-10-CM
The main term Heat (effects of) (excessive) carries 14 external cause index entries pointing to 10 ICD-10-CM codes. The default entry is X30, 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
14
Index Entries
10
Codes Referenced
X30
Default Code
H
Letter
14 of 14 shown
ICD-10-CM
Index Entries Under Heat 14 entries · 10 codes
Heat (effects of) (excessive) X30 Non-billable
due to
man-made conditions W92 Non-billable
on board watercraft V93.29 Non-billable
fishing boat V93.22 Non-billable
merchant ship V93.20 Non-billable
passenger ship V93.21 Non-billable
sailboat V93.24 Non-billable
specified powered craft NEC V93.23 Non-billable
weather (conditions) X30 Non-billable
from
electric heating apparatus causing burning X16 Non-billable
nuclear explosion in war operations see War operations, nuclear weapons
inappropriate in local application or packing in medical or surgical procedure Y63.5
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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.
