ICD-10-CM > S00-T88 > T66-T78 > T71 > T71.1 > T71.11 > T71.114 T71.114 Asphyxiation due to smothering under pillow, undetermined Non-Billable/Non-Specific Codes T71.114A..., initial encounterT71.114D..., subsequent encounterT71.114S..., sequela