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ICD-10-CM 2027 diagnosis code

T36.1X1Poisoning by cephalosporins and other beta-lactam antibiotics, accidental (unintentional)

Not billable — use a more specific codeRequires 7th character

T36.1X1 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.Short description: Poisoning by cephalospor/oth beta-lactm antibiot, acc

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T36.1X1

T36.1X1 is the ICD-10-CM diagnosis code for poisoning by cephalosporins and other beta-lactam antibiotics, accidental (unintentional). It belongs to category T36 (poisoning by, adverse effect of and underdosing of systemic antibiotics), block T36-T50 (poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within T36.1X, choose T36.1X1 (Poisoning by cephalosporins and other beta-lactam antibiotics, accidental (unintentional)) only when documentation doesn't support a more specific option: poisoning by cephalosporins and other beta-lactam antibiotics, intentional self-harm (T36.1X2), poisoning by cephalosporins and other beta-lactam antibiotics, assault (T36.1X3), poisoning by cephalosporins and other beta-lactam antibiotics, undetermined (T36.1X4), adverse effect of cephalosporins and other beta-lactam antibiotics (T36.1X5) and underdosing of cephalosporins and other beta-lactam antibiotics (T36.1X6).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

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

Coding notes

Applicable toConditions and synonyms classified to this code
  • Poisoning by cephalosporins and other beta-lactam antibiotics NOS

Notes that apply from higher levels

Instructions written at a parent level also apply to T36.1X1.

› From T36 Poisoning by, adverse effect of and underdosing of systemic antibiotics
Excludes1
  • 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)

Broader instructions also apply from T36-T50 Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Table of Drugs & Neoplasms entries

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about T36.1X1

Is T36.1X1 billable?

No. T36.1X1 is a header code. Report one of its more specific subcodes instead.