T40.996 (Underdosing of other psychodysleptics [hallucinogens]) is an umbrella ICD-10-CM medical diagnosis code in the Injury, poisoning and certain other consequences of external causes chapter. It identifies cases of underdosing of other psychodysleptics [hallucinogens] for clinical documentation, billing and epidemi

ICD-10-CM · Category

T40.996 - Underdosing of other psychodysleptics [hallucinogens]

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

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Sub-codes under T40.996

T40.996AUnderdosing of other psychodysleptics, initial encounterT40.996DUnderdosing of other psychodysleptics, subsequent encounterT40.996SUnderdosing of other psychodysleptics, sequela

Related diagnoses

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]

Common questions about T40.996 (Underdosing of other psychodysleptics [hallucinogens])

What does ICD-10 code T40.996 mean?
T40.996 is the ICD-10-CM 2025 code for 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 T40.996 a billable diagnosis code?
T40.996 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under T40.996. Browse the sub-codes listed on this page.
Which ICD-10 chapter does T40.996 belong to?
T40.996 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 Underdosing of other psychodysleptics [hallucinogens]?
For a plain-language explanation of Underdosing of other psychodysleptics [hallucinogens], ask GoDavaii's Health AI - it explains medical conditions in 90+ languages, free, with no signup. Tap "Ask GoDavaii AI about Underdosing of other psychodysleptics [hallucinogens]" 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 ↗