ICD-10-CM > S00-T88 > T66-T78 > T71 > T71.1 > T71.11 > T71.112 T71.112 Asphyxiation due to smothering under pillow, intentional self-harm Non-Billable/Non-Specific Codes T71.112A..., initial encounterT71.112D..., subsequent encounterT71.112S..., sequela