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ICD-10-CM · FY 2026 APRIL UPDATE

T49.9

Poisoning by, adverse effect of and underdosing of unspecified topical agent

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
T49.91Poisoning by unspecified topical agent, accidental (unintentional)Category
T49.91XAPoisoning by unspecified topical agent, accidental (unintentional), initial encounterBillable
T49.91XDPoisoning by unspecified topical agent, accidental (unintentional), subsequent encounterBillable
T49.91XSPoisoning by unspecified topical agent, accidental (unintentional), sequelaBillable
T49.92Poisoning by unspecified topical agent, intentional self-harmCategory
T49.92XAPoisoning by unspecified topical agent, intentional self-harm, initial encounterBillable
T49.92XDPoisoning by unspecified topical agent, intentional self-harm, subsequent encounterBillable
T49.92XSPoisoning by unspecified topical agent, intentional self-harm, sequelaBillable
T49.93Poisoning by unspecified topical agent, assaultCategory
T49.93XAPoisoning by unspecified topical agent, assault, initial encounterBillable
T49.93XDPoisoning by unspecified topical agent, assault, subsequent encounterBillable
T49.93XSPoisoning by unspecified topical agent, assault, sequelaBillable
T49.94Poisoning by unspecified topical agent, undeterminedCategory
T49.94XAPoisoning by unspecified topical agent, undetermined, initial encounterBillable
T49.94XDPoisoning by unspecified topical agent, undetermined, subsequent encounterBillable
T49.94XSPoisoning by unspecified topical agent, undetermined, sequelaBillable
T49.95Adverse effect of unspecified topical agentCategory
T49.95XAAdverse effect of unspecified topical agent, initial encounterBillable
T49.95XDAdverse effect of unspecified topical agent, subsequent encounterBillable
T49.95XSAdverse effect of unspecified topical agent, sequelaBillable
T49.96Underdosing of unspecified topical agentCategory
T49.96XAUnderdosing of unspecified topical agent, initial encounterBillable
T49.96XDUnderdosing of unspecified topical agent, subsequent encounterBillable
T49.96XSUnderdosing of unspecified topical agent, 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.