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ICD-10-CM · FY 2026 APRIL UPDATE

T40.2X

Poisoning by, adverse effect of and underdosing of other opioids

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
T40.2X1Poisoning by other opioids, accidental (unintentional)Category
T40.2X1APoisoning by other opioids, accidental (unintentional), initial encounterBillable
T40.2X1DPoisoning by other opioids, accidental (unintentional), subsequent encounterBillable
T40.2X1SPoisoning by other opioids, accidental (unintentional), sequelaBillable
T40.2X2Poisoning by other opioids, intentional self-harmCategory
T40.2X2APoisoning by other opioids, intentional self-harm, initial encounterBillable
T40.2X2DPoisoning by other opioids, intentional self-harm, subsequent encounterBillable
T40.2X2SPoisoning by other opioids, intentional self-harm, sequelaBillable
T40.2X3Poisoning by other opioids, assaultCategory
T40.2X3APoisoning by other opioids, assault, initial encounterBillable
T40.2X3DPoisoning by other opioids, assault, subsequent encounterBillable
T40.2X3SPoisoning by other opioids, assault, sequelaBillable
T40.2X4Poisoning by other opioids, undeterminedCategory
T40.2X4APoisoning by other opioids, undetermined, initial encounterBillable
T40.2X4DPoisoning by other opioids, undetermined, subsequent encounterBillable
T40.2X4SPoisoning by other opioids, undetermined, sequelaBillable
T40.2X5Adverse effect of other opioidsCategory
T40.2X5AAdverse effect of other opioids, initial encounterBillable
T40.2X5DAdverse effect of other opioids, subsequent encounterBillable
T40.2X5SAdverse effect of other opioids, sequelaBillable
T40.2X6Underdosing of other opioidsCategory
T40.2X6AUnderdosing of other opioids, initial encounterBillable
T40.2X6DUnderdosing of other opioids, subsequent encounterBillable
T40.2X6SUnderdosing of other opioids, 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.