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ICD-10-CM 2027 diagnosis code

T37.0Poisoning by, adverse effect of and underdosing of sulfonamides

Not billable — use a more specific codeRequires 7th character

T37.0 is a header code, so it can't be reported by itself. Choose one of the 1 more specific codes beneath it and add the required 7th character.Short description: Sulfonamides

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 T37.0

T37.0 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of sulfonamides. It belongs to category T37 (poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics), 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 1 subcodes must be used instead.

Within T37 (poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics), T37.0 is specifically for poisoning by, adverse effect of and underdosing of sulfonamides. Related codes cover antimycobacterial drugs (T37.1), antimalarials and drugs acting on other blood protozoa (T37.2), other antiprotozoal drugs (T37.3), anthelminthics (T37.4), antiviral drugs (T37.5), other specified systemic anti-infectives and antiparasitics (T37.8) and unspecified systemic anti-infective and antiparasitics (T37.9).

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 T37

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to T37.0.

› From T37 Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics
Excludes1
  • anti-infectives topically used for ear, nose and throat (T49.6-)
  • anti-infectives topically used for eye (T49.5-)
  • locally applied anti-infectives NEC (T49.0-)

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.

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 T37.0

Is T37.0 billable?

No. T37.0 is a header code. Report one of its more specific subcodes instead.