ICD-10-CM > S00-T88 > T66-T78 > T71 > T71.1 > T71.11 > T71.111 T71.111 Asphyxiation due to smothering under pillow, accidental Non-Billable/Non-Specific Applicable To Asphyxiation due to smothering under pillow NOS Codes T71.111A..., initial encounterT71.111D..., subsequent encounterT71.111S..., sequela