ICD-10-CM > S00-T88 > T66-T78 > T71 > T71.1 > T71.11 T71.11 Asphyxiation due to smothering under pillow Non-Billable/Non-Specific Codes T71.111Asphyxiation due to smothering under pillow, accidentalT71.111A..., initial encounterT71.111D..., subsequent encounterT71.111S..., sequelaT71.112Asphyxiation due to smothering under pillow, intentional self-harmT71.112A..., initial encounterT71.112D..., subsequent encounterT71.112S..., sequelaT71.113Asphyxiation due to smothering under pillow, assaultT71.113A..., initial encounterT71.113D..., subsequent encounterT71.113S..., sequelaT71.114Asphyxiation due to smothering under pillow, undeterminedT71.114A..., initial encounterT71.114D..., subsequent encounterT71.114S..., sequela