ICD-10-CM T36: Poisoning by, adverse effect of and underdosing of systemic antibiotics

ICD-10-CM Diagnosis Code (2025)

Official Description for T36

Poisoning by, adverse effect of and underdosing of systemic antibiotics

Coding Notes & Guidelines for T36

Excludes1: Not Coded Here
  • antineoplastic antibiotics (T45.1-)
  • locally applied antibiotic NEC (T49.0)
  • topically used antibiotic for ear, nose and throat (T49.6)
  • topically used antibiotic for eye (T49.5)
Inclusion Terms

Poisoning by penicillins NOS

Inclusion Terms

Poisoning by cephalosporins and other beta-lactam antibiotics NOS

Inclusion Terms

Poisoning by chloramphenicol group NOS

Inclusion Terms

Poisoning by macrolides NOS

Inclusion Terms

Poisoning by tetracyclines NOS

Inclusion Terms

Poisoning by, adverse effect of and underdosing of streptomycin

Inclusion Terms

Poisoning by aminoglycosides NOS

Inclusion Terms

Poisoning by rifampicins NOS

Inclusion Terms

Poisoning by antifungal antibiotics, systemically used NOS

Inclusion Terms

Poisoning by other systemic antibiotics NOS

Inclusion Terms

Poisoning by systemic antibiotic NOS

7th Character Guidance

The appropriate 7th character is to be added to each code from category T36

7th Character Definitions
  • A: initial encounter
  • D: subsequent encounter
  • S: sequela

Child Codes (More Specific Codes for T36):

T36.0 - Poisoning by, adverse effect of and underdosing of penicillins T36.0X - Poisoning by, adverse effect of and underdosing of penicillins T36.0X1 - Poisoning by penicillins, accidental (unintentional) T36.0X2 - Poisoning by penicillins, intentional self-harm T36.0X3 - Poisoning by penicillins, assault T36.0X4 - Poisoning by penicillins, undetermined T36.0X5 - Adverse effect of penicillins T36.0X6 - Underdosing of penicillins T36.1 - Poisoning by, adverse effect of and underdosing of cephalosporins and other beta-lactam antibiotics T36.1X - Poisoning by, adverse effect of and underdosing of cephalosporins and other beta-lactam antibiotics T36.1X1 - Poisoning by cephalosporins and other beta-lactam antibiotics, accidental (unintentional) T36.1X2 - Poisoning by cephalosporins and other beta-lactam antibiotics, intentional self-harm T36.1X3 - Poisoning by cephalosporins and other beta-lactam antibiotics, assault T36.1X4 - Poisoning by cephalosporins and other beta-lactam antibiotics, undetermined T36.1X5 - Adverse effect of cephalosporins and other beta-lactam antibiotics T36.1X6 - Underdosing of cephalosporins and other beta-lactam antibiotics T36.2 - Poisoning by, adverse effect of and underdosing of chloramphenicol group T36.2X - Poisoning by, adverse effect of and underdosing of chloramphenicol group T36.2X1 - Poisoning by chloramphenicol group, accidental (unintentional) T36.2X2 - Poisoning by chloramphenicol group, intentional self-harm T36.2X3 - Poisoning by chloramphenicol group, assault T36.2X4 - Poisoning by chloramphenicol group, undetermined T36.2X5 - Adverse effect of chloramphenicol group T36.2X6 - Underdosing of chloramphenicol group T36.3 - Poisoning by, adverse effect of and underdosing of macrolides T36.3X - Poisoning by, adverse effect of and underdosing of macrolides T36.3X1 - Poisoning by macrolides, accidental (unintentional) T36.3X2 - Poisoning by macrolides, intentional self-harm T36.3X3 - Poisoning by macrolides, assault T36.3X4 - Poisoning by macrolides, undetermined T36.3X5 - Adverse effect of macrolides T36.3X6 - Underdosing of macrolides T36.4 - Poisoning by, adverse effect of and underdosing of tetracyclines T36.4X - Poisoning by, adverse effect of and underdosing of tetracyclines T36.4X1 - Poisoning by tetracyclines, accidental (unintentional) T36.4X2 - Poisoning by tetracyclines, intentional self-harm T36.4X3 - Poisoning by tetracyclines, assault T36.4X4 - Poisoning by tetracyclines, undetermined T36.4X5 - Adverse effect of tetracyclines T36.4X6 - Underdosing of tetracyclines T36.5 - Poisoning by, adverse effect of and underdosing of aminoglycosides T36.5X - Poisoning by, adverse effect of and underdosing of aminoglycosides T36.5X1 - Poisoning by aminoglycosides, accidental (unintentional) T36.5X2 - Poisoning by aminoglycosides, intentional self-harm T36.5X3 - Poisoning by aminoglycosides, assault T36.5X4 - Poisoning by aminoglycosides, undetermined T36.5X5 - Adverse effect of aminoglycosides T36.5X6 - Underdosing of aminoglycosides T36.6 - Poisoning by, adverse effect of and underdosing of rifampicins T36.6X - Poisoning by, adverse effect of and underdosing of rifampicins T36.6X1 - Poisoning by rifampicins, accidental (unintentional) T36.6X2 - Poisoning by rifampicins, intentional self-harm T36.6X3 - Poisoning by rifampicins, assault T36.6X4 - Poisoning by rifampicins, undetermined T36.6X5 - Adverse effect of rifampicins T36.6X6 - Underdosing of rifampicins T36.7 - Poisoning by, adverse effect of and underdosing of antifungal antibiotics, systemically used T36.7X - Poisoning by, adverse effect of and underdosing of antifungal antibiotics, systemically used T36.7X1 - Poisoning by antifungal antibiotics, systemically used, accidental (unintentional) T36.7X2 - Poisoning by antifungal antibiotics, systemically used, intentional self-harm T36.7X3 - Poisoning by antifungal antibiotics, systemically used, assault T36.7X4 - Poisoning by antifungal antibiotics, systemically used, undetermined T36.7X5 - Adverse effect of antifungal antibiotics, systemically used T36.7X6 - Underdosing of antifungal antibiotics, systemically used T36.8 - Poisoning by, adverse effect of and underdosing of other systemic antibiotics T36.8X - Poisoning by, adverse effect of and underdosing of other systemic antibiotics T36.8X1 - Poisoning by other systemic antibiotics, accidental (unintentional) T36.8X2 - Poisoning by other systemic antibiotics, intentional self-harm T36.8X3 - Poisoning by other systemic antibiotics, assault T36.8X4 - Poisoning by other systemic antibiotics, undetermined T36.8X5 - Adverse effect of other systemic antibiotics T36.8X6 - Underdosing of other systemic antibiotics T36.9 - Poisoning by, adverse effect of and underdosing of unspecified systemic antibiotic T36.91 - Poisoning by unspecified systemic antibiotic, accidental (unintentional) T36.92 - Poisoning by unspecified systemic antibiotic, intentional self-harm T36.93 - Poisoning by unspecified systemic antibiotic, assault T36.94 - Poisoning by unspecified systemic antibiotic, undetermined T36.95 - Adverse effect of unspecified systemic antibiotic T36.96 - Underdosing of unspecified systemic antibiotic

About ICD-10-CM Code T36 (Poisoning by)

ICD-10-CM code T36 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM T36 became effective on October 1, 2024.

This page provides detailed information about T36 - Poisoning by, adverse effect of and underdosing of systemic antibiotics. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Poisoning by related to adverse effect of and underdosing of systemic antibiotics.