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ICD-10-CM · FY 2026 APRIL UPDATE

T40.60

Poisoning by, adverse effect of and underdosing of unspecified narcotics

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
T40.601Poisoning by unspecified narcotics, accidental (unintentional)Category
T40.601APoisoning by unspecified narcotics, accidental (unintentional), initial encounterBillable
T40.601DPoisoning by unspecified narcotics, accidental (unintentional), subsequent encounterBillable
T40.601SPoisoning by unspecified narcotics, accidental (unintentional), sequelaBillable
T40.602Poisoning by unspecified narcotics, intentional self-harmCategory
T40.602APoisoning by unspecified narcotics, intentional self-harm, initial encounterBillable
T40.602DPoisoning by unspecified narcotics, intentional self-harm, subsequent encounterBillable
T40.602SPoisoning by unspecified narcotics, intentional self-harm, sequelaBillable
T40.603Poisoning by unspecified narcotics, assaultCategory
T40.603APoisoning by unspecified narcotics, assault, initial encounterBillable
T40.603DPoisoning by unspecified narcotics, assault, subsequent encounterBillable
T40.603SPoisoning by unspecified narcotics, assault, sequelaBillable
T40.604Poisoning by unspecified narcotics, undeterminedCategory
T40.604APoisoning by unspecified narcotics, undetermined, initial encounterBillable
T40.604DPoisoning by unspecified narcotics, undetermined, subsequent encounterBillable
T40.604SPoisoning by unspecified narcotics, undetermined, sequelaBillable
T40.605Adverse effect of unspecified narcoticsCategory
T40.605AAdverse effect of unspecified narcotics, initial encounterBillable
T40.605DAdverse effect of unspecified narcotics, subsequent encounterBillable
T40.605SAdverse effect of unspecified narcotics, sequelaBillable
T40.606Underdosing of unspecified narcoticsCategory
T40.606AUnderdosing of unspecified narcotics, initial encounterBillable
T40.606DUnderdosing of unspecified narcotics, subsequent encounterBillable
T40.606SUnderdosing of unspecified narcotics, 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.

Open official CMS files

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