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ICD-10-CM · FY 2026 APRIL UPDATE

T37.3

Poisoning by, adverse effect of and underdosing of other antiprotozoal drugs

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
T37.3XPoisoning by, adverse effect of and underdosing of other antiprotozoal drugsCategory
T37.3X1Poisoning by other antiprotozoal drugs, accidental (unintentional)Category
T37.3X1APoisoning by other antiprotozoal drugs, accidental (unintentional), initial encounterBillable
T37.3X1DPoisoning by other antiprotozoal drugs, accidental (unintentional), subsequent encounterBillable
T37.3X1SPoisoning by other antiprotozoal drugs, accidental (unintentional), sequelaBillable
T37.3X2Poisoning by other antiprotozoal drugs, intentional self-harmCategory
T37.3X2APoisoning by other antiprotozoal drugs, intentional self-harm, initial encounterBillable
T37.3X2DPoisoning by other antiprotozoal drugs, intentional self-harm, subsequent encounterBillable
T37.3X2SPoisoning by other antiprotozoal drugs, intentional self-harm, sequelaBillable
T37.3X3Poisoning by other antiprotozoal drugs, assaultCategory
T37.3X3APoisoning by other antiprotozoal drugs, assault, initial encounterBillable
T37.3X3DPoisoning by other antiprotozoal drugs, assault, subsequent encounterBillable
T37.3X3SPoisoning by other antiprotozoal drugs, assault, sequelaBillable
T37.3X4Poisoning by other antiprotozoal drugs, undeterminedCategory
T37.3X4APoisoning by other antiprotozoal drugs, undetermined, initial encounterBillable
T37.3X4DPoisoning by other antiprotozoal drugs, undetermined, subsequent encounterBillable
T37.3X4SPoisoning by other antiprotozoal drugs, undetermined, sequelaBillable
T37.3X5Adverse effect of other antiprotozoal drugsCategory
T37.3X5AAdverse effect of other antiprotozoal drugs, initial encounterBillable
T37.3X5DAdverse effect of other antiprotozoal drugs, subsequent encounterBillable
T37.3X5SAdverse effect of other antiprotozoal drugs, sequelaBillable
T37.3X6Underdosing of other antiprotozoal drugsCategory
T37.3X6AUnderdosing of other antiprotozoal drugs, initial encounterBillable
T37.3X6DUnderdosing of other antiprotozoal drugs, subsequent encounterBillable
T37.3X6SUnderdosing of other antiprotozoal drugs, 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.