ICD-10-CM > S00-T88 > T51-T65 > T59 > T59.8 > T59.89 > T59.894 T59.894 Toxic effect of other specified gases, fumes and vapors, undetermined Non-Billable/Non-Specific Codes T59.894A..., initial encounterT59.894D..., subsequent encounterT59.894S..., sequela