T40 (Narcotics and psychodysleptics) is an umbrella ICD-10-CM medical diagnosis code in the Injury, poisoning and certain other consequences of external causes chapter. Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]

ICD-10-CM · Category

T40 - Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]

Narcotics and psychodysleptics

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

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Sub-codes under T40

T40.0Poisoning by, adverse effect of and underdosing of opiumT40.1Poisoning by and adverse effect of heroinT40.2Poisoning by, adverse effect of and underdosing of opioidsT40.3Poisoning by, adverse effect of and underdosing of methadoneT40.4Synthetic narcoticsT40.5Poisoning by, adverse effect of and underdosing of cocaineT40.6And unsp narcoticsT40.7Cannabis (derivatives)T40.8Poisoning by and adverse effect of lysergide [LSD]T40.9And unsp psychodysleptics

Common questions about T40 (Narcotics and psychodysleptics)

What does ICD-10 code T40 mean?
T40 is the ICD-10-CM 2025 code for Narcotics and psychodysleptics. Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers in the United States to classify diseases and conditions in a standard way.
Is T40 a billable diagnosis code?
T40 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under T40. Browse the sub-codes listed on this page.
Which ICD-10 chapter does T40 belong to?
T40 belongs to the chapter "Injury, poisoning and certain other consequences of external causes" (codes S00-T88). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Narcotics and psychodysleptics?
For a plain-language explanation of Narcotics and psychodysleptics, ask GoDavaii's Health AI - it explains medical conditions in 90+ languages, free, with no signup. Tap "Ask GoDavaii AI about Narcotics and psychodysleptics" above to get a personalised answer.

Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗