Question 1

Is T46 a billable ICD-10 code?

Accepted Answer

No, T46 is not a billable code. It is a category code that requires additional specificity. You must select a more specific code from the subcategories for billing purposes.

Question 2

What does ICD-10 code T46 mean?

Accepted Answer

ICD-10-CM code T46 represents Poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system. This code is part of the International Classification of Diseases, 10th Revision, Clinical Modification used for medical coding and billing in the United States.

Question 3

When was ICD-10 code T46 introduced?

Accepted Answer

Code T46 has been part of ICD-10-CM since 2016, when the coding system was mandated for use in the United States. This code was included in the original US implementation.

Question 4

What is the parent category for ICD-10 code T46?

Accepted Answer

The parent category for T46 is section:T36-T50 (Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)). This hierarchical classification helps organize related diagnoses for more accurate coding.

Question 5

What conditions are excluded from T46?

Accepted Answer

Code T46 has Type 1 Excludes (mutually exclusive conditions) including: poisoning by, adverse effect of and underdosing of metaraminol (T44.4). These conditions cannot be coded together with T46 as they represent different diagnoses.

Question 6

Does T46 require a 7th character extension?

Accepted Answer

Yes, T46 requires a 7th character to specify the encounter type. Available extensions include: A (initial encounter), D (subsequent encounter), S (sequela). Use "X" as a placeholder to fill empty positions before the 7th character (e.g., T46XXA for initial encounter). The extension indicates whether this is an initial visit, follow-up, or treatment for a late effect.

T462026

Excludes12Not coded together

Code First7Sequence another code first

Excludes27Not included here

Use Additional Code5Add code for detail

Notes3Additional information

Includes4Included conditions

7th Character Extensions3Encounter type specifiers