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ICD-10-CM · FY 2026 APRIL UPDATE

T36.4

Poisoning by, adverse effect of and underdosing of tetracyclines

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
T36.4XPoisoning by, adverse effect of and underdosing of tetracyclinesCategory
T36.4X1Poisoning by tetracyclines, accidental (unintentional)Category
T36.4X1APoisoning by tetracyclines, accidental (unintentional), initial encounterBillable
T36.4X1DPoisoning by tetracyclines, accidental (unintentional), subsequent encounterBillable
T36.4X1SPoisoning by tetracyclines, accidental (unintentional), sequelaBillable
T36.4X2Poisoning by tetracyclines, intentional self-harmCategory
T36.4X2APoisoning by tetracyclines, intentional self-harm, initial encounterBillable
T36.4X2DPoisoning by tetracyclines, intentional self-harm, subsequent encounterBillable
T36.4X2SPoisoning by tetracyclines, intentional self-harm, sequelaBillable
T36.4X3Poisoning by tetracyclines, assaultCategory
T36.4X3APoisoning by tetracyclines, assault, initial encounterBillable
T36.4X3DPoisoning by tetracyclines, assault, subsequent encounterBillable
T36.4X3SPoisoning by tetracyclines, assault, sequelaBillable
T36.4X4Poisoning by tetracyclines, undeterminedCategory
T36.4X4APoisoning by tetracyclines, undetermined, initial encounterBillable
T36.4X4DPoisoning by tetracyclines, undetermined, subsequent encounterBillable
T36.4X4SPoisoning by tetracyclines, undetermined, sequelaBillable
T36.4X5Adverse effect of tetracyclinesCategory
T36.4X5AAdverse effect of tetracyclines, initial encounterBillable
T36.4X5DAdverse effect of tetracyclines, subsequent encounterBillable
T36.4X5SAdverse effect of tetracyclines, sequelaBillable
T36.4X6Underdosing of tetracyclinesCategory
T36.4X6AUnderdosing of tetracyclines, initial encounterBillable
T36.4X6DUnderdosing of tetracyclines, subsequent encounterBillable
T36.4X6SUnderdosing of tetracyclines, 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.