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ICD-10-CM · FY 2026 APRIL UPDATE

T40.90

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

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
T40.901Poisoning by unspecified psychodysleptics [hallucinogens], accidental (unintentional)Category
T40.901APoisoning by unspecified psychodysleptics [hallucinogens], accidental (unintentional), initial encounterBillable
T40.901DPoisoning by unspecified psychodysleptics [hallucinogens], accidental (unintentional), subsequent encounterBillable
T40.901SPoisoning by unspecified psychodysleptics [hallucinogens], accidental (unintentional), sequelaBillable
T40.902Poisoning by unspecified psychodysleptics [hallucinogens], intentional self-harmCategory
T40.902APoisoning by unspecified psychodysleptics [hallucinogens], intentional self-harm, initial encounterBillable
T40.902DPoisoning by unspecified psychodysleptics [hallucinogens], intentional self-harm, subsequent encounterBillable
T40.902SPoisoning by unspecified psychodysleptics [hallucinogens], intentional self-harm, sequelaBillable
T40.903Poisoning by unspecified psychodysleptics [hallucinogens], assaultCategory
T40.903APoisoning by unspecified psychodysleptics [hallucinogens], assault, initial encounterBillable
T40.903DPoisoning by unspecified psychodysleptics [hallucinogens], assault, subsequent encounterBillable
T40.903SPoisoning by unspecified psychodysleptics [hallucinogens], assault, sequelaBillable
T40.904Poisoning by unspecified psychodysleptics [hallucinogens], undeterminedCategory
T40.904APoisoning by unspecified psychodysleptics [hallucinogens], undetermined, initial encounterBillable
T40.904DPoisoning by unspecified psychodysleptics [hallucinogens], undetermined, subsequent encounterBillable
T40.904SPoisoning by unspecified psychodysleptics [hallucinogens], undetermined, sequelaBillable
T40.905Adverse effect of unspecified psychodysleptics [hallucinogens]Category
T40.905AAdverse effect of unspecified psychodysleptics [hallucinogens], initial encounterBillable
T40.905DAdverse effect of unspecified psychodysleptics [hallucinogens], subsequent encounterBillable
T40.905SAdverse effect of unspecified psychodysleptics [hallucinogens], sequelaBillable
T40.906Underdosing of unspecified psychodysleptics [hallucinogens]Category
T40.906AUnderdosing of unspecified psychodysleptics [hallucinogens], initial encounterBillable
T40.906DUnderdosing of unspecified psychodysleptics [hallucinogens], subsequent encounterBillable
T40.906SUnderdosing of unspecified psychodysleptics [hallucinogens], sequelaBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

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ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.