ICD-10-CM External Cause Index · FY 2026 Letter I

External Cause Index Terms Starting With I ICD-10-CM

The letter I section of the FY 2026 External Cause of Injuries Index carries 19 main terms, from Ictus to Intoxication. Terms with a direct code link straight to the code page, cross references point to the main term that holds the codes, and terms with a handful of sub-entries render in full right here. The largest terms open their own full index page.

✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026

Main Terms

238

Index Entries

Direct Codes

Cross-refs

A B C D E F G HIJ K L M N O P R S T U V W

19 of 19 shown

IctusSub-entries
caloris see also Heat
solaris X30 Non-billable
Ignition (accidental)Sub-entries X08.8 Non-billable see also Exposure, fire
anesthetic gas in operating room W40.1 Non-billable
apparel X06.2 Non-billable
from highly flammable material X04 Non-billable
nightwear X05 Non-billable
View all 22 entries for Ignition →
Immersion (accidental)Sub-entries see also Drowning
hand or foot due to cold (excessive) X31 Non-billable
Implantation of quills of porcupineCode W55.89 Non-billable
Inanition (from) (hunger)Sub-entries X58 Non-billable
thirst X58 Non-billable
Inappropriate operation performedSub-entries
correct operation on wrong side or body part (wrong side) (wrong site) Y65.53
operation intended for another patient done on wrong patient Y65.52
wrong operation performed on correct patient Y65.51
Inattention after, at birth (homicidal intent) (infanticidal intent)Code X58 Non-billable
Incident, adverseSub-entries
device
anesthesiology Y70.8
accessory Y70.2
diagnostic Y70.0
View all 150 entries for Incident →
Incineration (accidental)Cross-ref See: Exposure, fire
InfanticideCross-ref See: Assault
Infrasound waves (causing injury)Code W49.9 Non-billable
IngestionSub-entries
foreign body (causing injury) (with obstruction) see Foreign body, alimentary canal
poisonous
plant (s) X58 Non-billable
substance NEC see Table of Drugs and Chemicals
InhalationSub-entries
excessively cold substance, man-made see Exposure, cold, man-made
food (any type) (into respiratory tract) (with asphyxia, obstruction respiratory tract, suffocation) T18 Non-billable see categories T17 and
foreign body see Foreign body, aspiration
gastric contents (with asphyxia, obstruction respiratory passage, suffocation) T17.81 Non-billable
View all 14 entries for Inhalation →
Injury, injured (accidental (ly)) NOSSub-entries X58 Non-billable
by, caused by, from
assault see Assault
law-enforcing agent, police, in course of legal intervention see Legal intervention
suicide (attempt) X83.8 Non-billable
View all 22 entries for Injury →
Insolation, effectsCode X30 Non-billable
Insufficient nourishmentCode X58 Non-billable
Interruption of respiration (by)Sub-entries
food (lodged in esophagus) T18 Non-billable see categories T17 and
vomitus (lodged in esophagus) T17.81 Non-billable
Intervention, legalCross-ref See: Legal intervention
IntoxicationSub-entries
drug see Table of Drugs and Chemicals
poison see Table of Drugs and Chemicals

Related References

External Cause of Injuries Index Index to Diseases and Injuries ICD-10-CM Code Lookup

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.