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T40

Non-billable

Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]

T40 is the ICD-10-CM code for Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]. It is a non-billable category code — use a more specific child code such as T40.0 for billing.

Status
Header (non-billable)
Chapter
S00-T88
Subcodes
10
Edition
FY2026

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

Excludes2 — not included here

  • •drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.-F19.-)

Frequently asked questions

What is ICD-10 code T40?
T40 is the ICD-10-CM code for "Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
Is T40 a billable code?
No — T40 is a non-billable header code. Use a more specific child code (such as T40.0) for billing.
What are the subcodes of T40?
T40 has 10 more specific child codes, including T40.0, T40.1, T40.2.

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

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