Back to ICD-10 library
ICD-10-CM · FY 2026 APRIL UPDATE

T36.9

Poisoning by, adverse effect of and underdosing of unspecified systemic antibiotic

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
T36.91Poisoning by unspecified systemic antibiotic, accidental (unintentional)Category
T36.91XAPoisoning by unspecified systemic antibiotic, accidental (unintentional), initial encounterBillable
T36.91XDPoisoning by unspecified systemic antibiotic, accidental (unintentional), subsequent encounterBillable
T36.91XSPoisoning by unspecified systemic antibiotic, accidental (unintentional), sequelaBillable
T36.92Poisoning by unspecified systemic antibiotic, intentional self-harmCategory
T36.92XAPoisoning by unspecified systemic antibiotic, intentional self-harm, initial encounterBillable
T36.92XDPoisoning by unspecified systemic antibiotic, intentional self-harm, subsequent encounterBillable
T36.92XSPoisoning by unspecified systemic antibiotic, intentional self-harm, sequelaBillable
T36.93Poisoning by unspecified systemic antibiotic, assaultCategory
T36.93XAPoisoning by unspecified systemic antibiotic, assault, initial encounterBillable
T36.93XDPoisoning by unspecified systemic antibiotic, assault, subsequent encounterBillable
T36.93XSPoisoning by unspecified systemic antibiotic, assault, sequelaBillable
T36.94Poisoning by unspecified systemic antibiotic, undeterminedCategory
T36.94XAPoisoning by unspecified systemic antibiotic, undetermined, initial encounterBillable
T36.94XDPoisoning by unspecified systemic antibiotic, undetermined, subsequent encounterBillable
T36.94XSPoisoning by unspecified systemic antibiotic, undetermined, sequelaBillable
T36.95Adverse effect of unspecified systemic antibioticCategory
T36.95XAAdverse effect of unspecified systemic antibiotic, initial encounterBillable
T36.95XDAdverse effect of unspecified systemic antibiotic, subsequent encounterBillable
T36.95XSAdverse effect of unspecified systemic antibiotic, sequelaBillable
T36.96Underdosing of unspecified systemic antibioticCategory
T36.96XAUnderdosing of unspecified systemic antibiotic, initial encounterBillable
T36.96XDUnderdosing of unspecified systemic antibiotic, subsequent encounterBillable
T36.96XSUnderdosing of unspecified systemic antibiotic, 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.