ICD-10-CM > S00-T88 > T51-T65 > T65 > T65.5 > T65.5X > T65.5X4 T65.5X4 Toxic effect of nitroglycerin and other nitric acids and esters, undetermined Non-Billable/Non-Specific Codes T65.5X4A..., initial encounterT65.5X4D..., subsequent encounterT65.5X4S..., sequela