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ICD-10-CM · FY 2026 APRIL UPDATE

T36.1

Poisoning by, adverse effect of and underdosing of cephalosporins and other beta-lactam antibiotics

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
T36.1XPoisoning by, adverse effect of and underdosing of cephalosporins and other beta-lactam antibioticsCategory
T36.1X1Poisoning by cephalosporins and other beta-lactam antibiotics, accidental (unintentional)Category
T36.1X1APoisoning by cephalosporins and other beta-lactam antibiotics, accidental (unintentional), initial encounterBillable
T36.1X1DPoisoning by cephalosporins and other beta-lactam antibiotics, accidental (unintentional), subsequent encounterBillable
T36.1X1SPoisoning by cephalosporins and other beta-lactam antibiotics, accidental (unintentional), sequelaBillable
T36.1X2Poisoning by cephalosporins and other beta-lactam antibiotics, intentional self-harmCategory
T36.1X2APoisoning by cephalosporins and other beta-lactam antibiotics, intentional self-harm, initial encounterBillable
T36.1X2DPoisoning by cephalosporins and other beta-lactam antibiotics, intentional self-harm, subsequent encounterBillable
T36.1X2SPoisoning by cephalosporins and other beta-lactam antibiotics, intentional self-harm, sequelaBillable
T36.1X3Poisoning by cephalosporins and other beta-lactam antibiotics, assaultCategory
T36.1X3APoisoning by cephalosporins and other beta-lactam antibiotics, assault, initial encounterBillable
T36.1X3DPoisoning by cephalosporins and other beta-lactam antibiotics, assault, subsequent encounterBillable
T36.1X3SPoisoning by cephalosporins and other beta-lactam antibiotics, assault, sequelaBillable
T36.1X4Poisoning by cephalosporins and other beta-lactam antibiotics, undeterminedCategory
T36.1X4APoisoning by cephalosporins and other beta-lactam antibiotics, undetermined, initial encounterBillable
T36.1X4DPoisoning by cephalosporins and other beta-lactam antibiotics, undetermined, subsequent encounterBillable
T36.1X4SPoisoning by cephalosporins and other beta-lactam antibiotics, undetermined, sequelaBillable
T36.1X5Adverse effect of cephalosporins and other beta-lactam antibioticsCategory
T36.1X5AAdverse effect of cephalosporins and other beta-lactam antibiotics, initial encounterBillable
T36.1X5DAdverse effect of cephalosporins and other beta-lactam antibiotics, subsequent encounterBillable
T36.1X5SAdverse effect of cephalosporins and other beta-lactam antibiotics, sequelaBillable
T36.1X6Underdosing of cephalosporins and other beta-lactam antibioticsCategory
T36.1X6AUnderdosing of cephalosporins and other beta-lactam antibiotics, initial encounterBillable
T36.1X6DUnderdosing of cephalosporins and other beta-lactam antibiotics, subsequent encounterBillable
T36.1X6SUnderdosing of cephalosporins and other beta-lactam antibiotics, 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.