Coding and coverage · ICD-10-CM

T38 Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified

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

  • T38.0 Poisoning by, adverse effect of and underdosing of glucocorticoids and synthetic analoguesHeader
  • T38.1 Poisoning by, adverse effect of and underdosing of thyroid hormones and substitutesHeader
  • T38.2 Poisoning by, adverse effect of and underdosing of antithyroid drugsHeader
  • T38.3 Poisoning by, adverse effect of and underdosing of insulin and oral hypoglycemic [antidiabetic] drugsHeader
  • T38.4 Poisoning by, adverse effect of and underdosing of oral contraceptivesHeader
  • T38.5 Poisoning by, adverse effect of and underdosing of other estrogens and progestogensHeader
  • T38.6 Poisoning by, adverse effect of and underdosing of antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classifiedHeader
  • T38.7 Poisoning by, adverse effect of and underdosing of androgens and anabolic congenersHeader
  • T38.8 Poisoning by, adverse effect of and underdosing of other and unspecified hormones and synthetic substitutesHeader
  • T38.9 Poisoning by, adverse effect of and underdosing of other and unspecified hormone antagonistsHeader

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.
  • mineralocorticoids and their antagonists (T50.0-)
  • oxytocic hormones (T48.0-)
  • parathyroid hormones and derivatives (T50.9-)
7th charactersThe appropriate 7th character is to be added to each code from category T38
  • 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.