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ICD-10-CM · FY 2026 APRIL UPDATE

T48.99

Poisoning by, adverse effect of and underdosing of other agents primarily acting on the respiratory system

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
T48.991Poisoning by other agents primarily acting on the respiratory system, accidental (unintentional)Category
T48.991APoisoning by other agents primarily acting on the respiratory system, accidental (unintentional), initial encounterBillable
T48.991DPoisoning by other agents primarily acting on the respiratory system, accidental (unintentional), subsequent encounterBillable
T48.991SPoisoning by other agents primarily acting on the respiratory system, accidental (unintentional), sequelaBillable
T48.992Poisoning by other agents primarily acting on the respiratory system, intentional self-harmCategory
T48.992APoisoning by other agents primarily acting on the respiratory system, intentional self-harm, initial encounterBillable
T48.992DPoisoning by other agents primarily acting on the respiratory system, intentional self-harm, subsequent encounterBillable
T48.992SPoisoning by other agents primarily acting on the respiratory system, intentional self-harm, sequelaBillable
T48.993Poisoning by other agents primarily acting on the respiratory system, assaultCategory
T48.993APoisoning by other agents primarily acting on the respiratory system, assault, initial encounterBillable
T48.993DPoisoning by other agents primarily acting on the respiratory system, assault, subsequent encounterBillable
T48.993SPoisoning by other agents primarily acting on the respiratory system, assault, sequelaBillable
T48.994Poisoning by other agents primarily acting on the respiratory system, undeterminedCategory
T48.994APoisoning by other agents primarily acting on the respiratory system, undetermined, initial encounterBillable
T48.994DPoisoning by other agents primarily acting on the respiratory system, undetermined, subsequent encounterBillable
T48.994SPoisoning by other agents primarily acting on the respiratory system, undetermined, sequelaBillable
T48.995Adverse effect of other agents primarily acting on the respiratory systemCategory
T48.995AAdverse effect of other agents primarily acting on the respiratory system, initial encounterBillable
T48.995DAdverse effect of other agents primarily acting on the respiratory system, subsequent encounterBillable
T48.995SAdverse effect of other agents primarily acting on the respiratory system, sequelaBillable
T48.996Underdosing of other agents primarily acting on the respiratory systemCategory
T48.996AUnderdosing of other agents primarily acting on the respiratory system, initial encounterBillable
T48.996DUnderdosing of other agents primarily acting on the respiratory system, subsequent encounterBillable
T48.996SUnderdosing of other agents primarily acting on the respiratory system, 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.