ICD-10-CM > S00-T88 > T66-T78 > T71 > T71.2 > T71.21 T71.21 Asphyxiation due to cave-in or falling earth Non-Billable/Non-Specific Use Additional code for any associated cataclysm (X34-X38) Codes T71.21XA..., initial encounterT71.21XD..., subsequent encounterT71.21XS..., sequela