T40.99 (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 other psychodysleptics [hallucinogens]

ICD-10-CM · Category

T40.99 - Poisoning by, adverse effect of and underdosing of other psychodysleptics [hallucinogens]

Psychodysleptics

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

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Sub-codes under T40.99

T40.991Poisoning by oth psychodyslept, accidental (unintentional)T40.992Poisoning by other psychodysleptics, intentional self-harmT40.993Poisoning by other psychodysleptics [hallucinogens], assaultT40.994Poisoning by other psychodysleptics, undeterminedT40.995Adverse effect of other psychodysleptics [hallucinogens]T40.996Underdosing of other psychodysleptics [hallucinogens]

Related diagnoses

T40.90Unsp psychodysleptics

Common questions about T40.99 (Psychodysleptics)

What does ICD-10 code T40.99 mean?
T40.99 is the ICD-10-CM 2025 code for Psychodysleptics. Poisoning by, adverse effect of and underdosing of other 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 T40.99 a billable diagnosis code?
T40.99 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under T40.99. Browse the sub-codes listed on this page.
Which ICD-10 chapter does T40.99 belong to?
T40.99 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 Psychodysleptics?
For a plain-language explanation of Psychodysleptics, ask GoDavaii's Health AI - it explains medical conditions in 90+ languages, free, with no signup. Tap "Ask GoDavaii AI about 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 ↗