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ICD-10-CM · FY 2026 APRIL UPDATE

T44.99

Poisoning by, adverse effect of and underdosing of other drugs primarily affecting the autonomic nervous 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
T44.991Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional)Category
T44.991APoisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional), initial encounterBillable
T44.991DPoisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional), subsequent encounterBillable
T44.991SPoisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional), sequelaBillable
T44.992Poisoning by other drug primarily affecting the autonomic nervous system, intentional self-harmCategory
T44.992APoisoning by other drug primarily affecting the autonomic nervous system, intentional self-harm, initial encounterBillable
T44.992DPoisoning by other drug primarily affecting the autonomic nervous system, intentional self-harm, subsequent encounterBillable
T44.992SPoisoning by other drug primarily affecting the autonomic nervous system, intentional self-harm, sequelaBillable
T44.993Poisoning by other drug primarily affecting the autonomic nervous system, assaultCategory
T44.993APoisoning by other drug primarily affecting the autonomic nervous system, assault, initial encounterBillable
T44.993DPoisoning by other drug primarily affecting the autonomic nervous system, assault, subsequent encounterBillable
T44.993SPoisoning by other drug primarily affecting the autonomic nervous system, assault, sequelaBillable
T44.994Poisoning by other drug primarily affecting the autonomic nervous system, undeterminedCategory
T44.994APoisoning by other drug primarily affecting the autonomic nervous system, undetermined, initial encounterBillable
T44.994DPoisoning by other drug primarily affecting the autonomic nervous system, undetermined, subsequent encounterBillable
T44.994SPoisoning by other drug primarily affecting the autonomic nervous system, undetermined, sequelaBillable
T44.995Adverse effect of other drug primarily affecting the autonomic nervous systemCategory
T44.995AAdverse effect of other drug primarily affecting the autonomic nervous system, initial encounterBillable
T44.995DAdverse effect of other drug primarily affecting the autonomic nervous system, subsequent encounterBillable
T44.995SAdverse effect of other drug primarily affecting the autonomic nervous system, sequelaBillable
T44.996Underdosing of other drug primarily affecting the autonomic nervous systemCategory
T44.996AUnderdosing of other drug primarily affecting the autonomic nervous system, initial encounterBillable
T44.996DUnderdosing of other drug primarily affecting the autonomic nervous system, subsequent encounterBillable
T44.996SUnderdosing of other drug primarily affecting the autonomic nervous 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.

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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.