ICD-10-CM > S00-T88 > T51-T65 > T53 > T53.5 > T53.5X > T53.5X4 T53.5X4 Toxic effect of chlorofluorocarbons, undetermined Non-Billable/Non-Specific Codes T53.5X4A..., initial encounterT53.5X4D..., subsequent encounterT53.5X4S..., sequela