T65.5X4Header code — not billable

Toxic effect of nitroglycerin and other nitric acids and esters, undetermined

Short description: Toxic effect of nitro and oth nitric acids and esters, undet

Chapter
19. Injury, poisoning and certain other consequences of external causes
Category
T65
Effective date
October 1, 2026

Related codes in category T65

T65Toxic effect of other and unspecified substancesT65.0Toxic effect of cyanidesT65.0XToxic effect of cyanidesT65.0X1Toxic effect of cyanides, accidental (unintentional)T65.0X1AToxic effect of cyanides, accidental (unintentional), initYesT65.0X1DToxic effect of cyanides, accidental (unintentional), subsYesT65.0X1SToxic effect of cyanides, accidental, sequelaYesT65.0X2Toxic effect of cyanides, intentional self-harmT65.0X2AToxic effect of cyanides, intentional self-harm, init encntrYesT65.0X2DToxic effect of cyanides, intentional self-harm, subs encntrYesT65.0X2SToxic effect of cyanides, intentional self-harm, sequelaYesT65.0X3Toxic effect of cyanides, assault

Frequently asked questions

What is ICD-10 code T65.5X4?

T65.5X4 is an ICD-10-CM diagnosis code for Toxic effect of nitroglycerin and other nitric acids and esters, undetermined.

Is T65.5X4 a billable code?

No. T65.5X4 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is T65.5X4 in?

T65.5X4 falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.

When did T65.5X4 become effective?

T65.5X4 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to T65.5X4?

T65.5X4 belongs to category T65, which includes 12 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.