Coding and coverage · ICD-10-CM

T48 Poisoning by, adverse effect of and underdosing of agents primarily acting on smooth and skeletal muscles and the respiratory system

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

  • T48.0 Poisoning by, adverse effect of and underdosing of oxytocic drugsHeader
  • T48.1 Poisoning by, adverse effect of and underdosing of skeletal muscle relaxants [neuromuscular blocking agents]Header
  • T48.2 Poisoning by, adverse effect of and underdosing of other and unspecified drugs acting on musclesHeader
  • T48.3 Poisoning by, adverse effect of and underdosing of antitussivesHeader
  • T48.4 Poisoning by, adverse effect of and underdosing of expectorantsHeader
  • T48.5 Poisoning by, adverse effect of and underdosing of other anti-common-cold drugsHeader
  • T48.6 Poisoning by, adverse effect of and underdosing of antiasthmatics, not elsewhere classifiedHeader
  • T48.9 Poisoning by, adverse effect of and underdosing of other and unspecified agents primarily acting on the respiratory systemHeader

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

7th charactersThe appropriate 7th character is to be added to each code from category T48
  • 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.