- Ictus,
- Ignition (accidental), see Exposure, fireX08.8
- Immersion (accidental), see Drowning
- Implantation of quills of porcupine, W55.89
- Inanition (from) (hunger), X58
- Inappropriate operation performed,
- Inattention after, at birth (homicidal intent) (infanticidal intent), X58
- Incident, adverse,
- Incineration (accidental), see Exposure, fire
- Infanticide, see Assault
- Infrasound waves (causing injury), W49.9
- Ingestion,
- Inhalation,
- Injury, injured NOS (accidental(ly)), X58
- Insolation, effects, X30
- Insufficient nourishment, X58
- Interruption of respiration (by),
- Intervention, legal, see Legal intervention
- Intoxication,