T46.0X3 vs T46.0X4

T46.0X3 (Poisoning by cardiac-stimulant glycosides and drugs of similar action, assault) compared with T46.0X4 (Poisoning by cardiac-stimulant glycosides and drugs of similar action, undetermined), from the official CMS tabular data. T46.0X3 and T46.0X4 code the same substance (Acetyldigitoxin) with a different intent.

Relationship

Informational

Drug table relationship

T46.0X3

Poisoning by cardiac-stimulant glycosides and drugs of similar action, assault

↔

T46.0X4

Poisoning by cardiac-stimulant glycosides and drugs of similar action, undetermined

Same substance, different circumstance of exposure.

Same substance — undetermined intent (Acetyldigitoxin)

Accidental poisoning, intentional self-harm, assault, undetermined intent, adverse effect and underdosing are mutually exclusive columns — exactly one applies to a given encounter.

Source: CMS Table of Drugs and Chemicals

Can these codes be reported together?

Same substance, different intent. T46.0X3 and T46.0X4 code the same substance (Acetyldigitoxin) with a different circumstance of exposure.

From the CMS Table of Drugs and Chemicals: accidental poisoning, intentional self-harm, assault, undetermined intent, adverse effect and underdosing are mutually exclusive columns — only one of them applies to a given encounter.

Side by side

	T46.0X3Poisoning by cardiac-stimulant glycosides and drugs of similar action, assault	T46.0X4Poisoning by cardiac-stimulant glycosides and drugs of similar action, undetermined
Billing status	Non-billable header Report instead: T46.0X3A, T46.0X3D, T46.0X3S	Non-billable header Report instead: T46.0X4A, T46.0X4D, T46.0X4S
Classification	S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)	S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
Definition	Poisoning by cardiac-stimulant glycosides and drugs of similar action, assault is a non-billable ICD-10-CM category code (T46.0X3).	Poisoning by cardiac-stimulant glycosides and drugs of similar action, undetermined is a non-billable ICD-10-CM category code (T46.0X4).
7th character	The appropriate 7th character is to be added to each code from category T46	The appropriate 7th character is to be added to each code from category T46
Includes	adverse effect of correct substance properly administered poisoning by overdose of substance poisoning by wrong substance given or taken in error underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed	adverse effect of correct substance properly administered poisoning by overdose of substance poisoning by wrong substance given or taken in error underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed
Use additional code	code(s) to specify: manifestations of poisoning underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)	code(s) to specify: manifestations of poisoning underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
Code first	, for adverse effects, the nature of the adverse effect, such as: adverse effect NOS (T88.7)	, for adverse effects, the nature of the adverse effect, such as: adverse effect NOS (T88.7)

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources