ICD-10-CM > S00-T88 > T51-T65 > T59 > T59.5 > T59.5X > T59.5X1 T59.5X1 Toxic effect of fluorine gas and hydrogen fluoride, accidental (unintentional) Non-Billable/Non-Specific Applicable To Toxic effect of fluorine gas and hydrogen fluoride NOS Codes T59.5X1A..., initial encounterT59.5X1D..., subsequent encounterT59.5X1S..., sequela