ICD-10-CM > S00-T88 > T51-T65 > T54 > T54.9 > T54.94 T54.94 Toxic effect of unspecified corrosive substance, undetermined Non-Billable/Non-Specific Codes T54.94XA..., initial encounterT54.94XD..., subsequent encounterT54.94XS..., sequela