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T40.4

Non-billable

Poisoning by, adverse effect of and underdosing of other synthetic narcotics

T40.4 is the ICD-10-CM code for Poisoning by, adverse effect of and underdosing of other synthetic narcotics. It is a non-billable category code — use a more specific child code such as T40.41 for billing.

Status
Header (non-billable)
Chapter
S00-T88
Parent
T40
Subcodes
3
Edition
FY2026

S00-T88 Injury, poisoning and certain other consequences of external causes

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code T40.4?
T40.4 is the ICD-10-CM code for "Poisoning by, adverse effect of and underdosing of other synthetic narcotics". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
Is T40.4 a billable code?
No — T40.4 is a non-billable header code. Use a more specific child code (such as T40.41) for billing.
What are the subcodes of T40.4?
T40.4 has 3 more specific child codes, including T40.41, T40.42, T40.49.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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