ICD-10-CM > S00-T88 > T51-T65 > T59 > T59.9 > T59.94 T59.94 Toxic effect of unspecified gases, fumes and vapors, undetermined Non-Billable/Non-Specific Codes T59.94XA..., initial encounterT59.94XD..., subsequent encounterT59.94XS..., sequela