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ICD-10-CM · FY 2026 APRIL UPDATE

T49.6

Poisoning by, adverse effect of and underdosing of otorhinolaryngological drugs and preparations

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
T49.6XPoisoning by, adverse effect of and underdosing of otorhinolaryngological drugs and preparationsCategory
T49.6X1Poisoning by otorhinolaryngological drugs and preparations, accidental (unintentional)Category
T49.6X1APoisoning by otorhinolaryngological drugs and preparations, accidental (unintentional), initial encounterBillable
T49.6X1DPoisoning by otorhinolaryngological drugs and preparations, accidental (unintentional), subsequent encounterBillable
T49.6X1SPoisoning by otorhinolaryngological drugs and preparations, accidental (unintentional), sequelaBillable
T49.6X2Poisoning by otorhinolaryngological drugs and preparations, intentional self-harmCategory
T49.6X2APoisoning by otorhinolaryngological drugs and preparations, intentional self-harm, initial encounterBillable
T49.6X2DPoisoning by otorhinolaryngological drugs and preparations, intentional self-harm, subsequent encounterBillable
T49.6X2SPoisoning by otorhinolaryngological drugs and preparations, intentional self-harm, sequelaBillable
T49.6X3Poisoning by otorhinolaryngological drugs and preparations, assaultCategory
T49.6X3APoisoning by otorhinolaryngological drugs and preparations, assault, initial encounterBillable
T49.6X3DPoisoning by otorhinolaryngological drugs and preparations, assault, subsequent encounterBillable
T49.6X3SPoisoning by otorhinolaryngological drugs and preparations, assault, sequelaBillable
T49.6X4Poisoning by otorhinolaryngological drugs and preparations, undeterminedCategory
T49.6X4APoisoning by otorhinolaryngological drugs and preparations, undetermined, initial encounterBillable
T49.6X4DPoisoning by otorhinolaryngological drugs and preparations, undetermined, subsequent encounterBillable
T49.6X4SPoisoning by otorhinolaryngological drugs and preparations, undetermined, sequelaBillable
T49.6X5Adverse effect of otorhinolaryngological drugs and preparationsCategory
T49.6X5AAdverse effect of otorhinolaryngological drugs and preparations, initial encounterBillable
T49.6X5DAdverse effect of otorhinolaryngological drugs and preparations, subsequent encounterBillable
T49.6X5SAdverse effect of otorhinolaryngological drugs and preparations, sequelaBillable
T49.6X6Underdosing of otorhinolaryngological drugs and preparationsCategory
T49.6X6AUnderdosing of otorhinolaryngological drugs and preparations, initial encounterBillable
T49.6X6DUnderdosing of otorhinolaryngological drugs and preparations, subsequent encounterBillable
T49.6X6SUnderdosing of otorhinolaryngological drugs and preparations, 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.