Coding and coverage · ICD-10-CM

T37 Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics

Not billable (header)Chapter 19

This code needs a 7th character (use X as a placeholder for missing characters).

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Codes under this one

  • T37.0 Poisoning by, adverse effect of and underdosing of sulfonamidesHeader
  • T37.1 Poisoning by, adverse effect of and underdosing of antimycobacterial drugsHeader
  • T37.2 Poisoning by, adverse effect of and underdosing of antimalarials and drugs acting on other blood protozoaHeader
  • T37.3 Poisoning by, adverse effect of and underdosing of other antiprotozoal drugsHeader
  • T37.4 Poisoning by, adverse effect of and underdosing of anthelminthicsHeader
  • T37.5 Poisoning by, adverse effect of and underdosing of antiviral drugsHeader
  • T37.8 Poisoning by, adverse effect of and underdosing of other specified systemic anti-infectives and antiparasiticsHeader
  • T37.9 Poisoning by, adverse effect of and underdosing of unspecified systemic anti-infective and antiparasiticsHeader

Instructional notes

Chapter 19

Excludes2Not included here: the patient may have both; report both when both are present.
Use additional codeAdd a second code for the full picture.
  • code to identify any retained foreign body, if applicable (Z18.-)
Notes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

This code

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
  • 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-)
7th charactersThe appropriate 7th character is to be added to each code from category T37
  • A initial encounter
  • D subsequent encounter
  • S sequela

Chapter 19: Injury, poisoning and certain other consequences of external causes · T07-T88 Injury, poisoning and certain other consequences of external causes (T07-T88)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.