ICD-10-CM > S00-T88 > T51-T65 > T53 > T53.7 > T53.7X > T53.7X4 T53.7X4 Toxic effect of other halogen derivatives of aromatic hydrocarbons, undetermined Non-Billable/Non-Specific Codes T53.7X4A..., initial encounterT53.7X4D..., subsequent encounterT53.7X4S..., sequela