ICD-10-CM diagnosis code
T38.3X6S Underdosing of insulin and oral hypoglycemic [antidiabetic] drugs, sequela
- Billable
- Yes, a complete code (FY2026)
Encounter (7th character)
This code is for a sequela: a complication or condition that arises as a direct result of the injury. The sequela itself is usually coded first, followed by this code.
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Other codes in T38
234 complete codes in this category.
- T38.3X4SPoisoning by insulin and oral hypoglycemic [antidiabetic] drugs, undetermined, sequela
- T38.3X5AAdverse effect of insulin and oral hypoglycemic [antidiabetic] drugs, initial encounter
- T38.3X5DAdverse effect of insulin and oral hypoglycemic [antidiabetic] drugs, subsequent encounter
- T38.3X5SAdverse effect of insulin and oral hypoglycemic [antidiabetic] drugs, sequela
- T38.3X6AUnderdosing of insulin and oral hypoglycemic [antidiabetic] drugs, initial encounter
- T38.3X6DUnderdosing of insulin and oral hypoglycemic [antidiabetic] drugs, subsequent encounter
- T38.3X6SUnderdosing of insulin and oral hypoglycemic [antidiabetic] drugs, sequela
- T38.4X1APoisoning by oral contraceptives, accidental (unintentional), initial encounter
- T38.4X1DPoisoning by oral contraceptives, accidental (unintentional), subsequent encounter
- T38.4X1SPoisoning by oral contraceptives, accidental (unintentional), sequela
- T38.4X2APoisoning by oral contraceptives, intentional self-harm, initial encounter
- T38.4X2DPoisoning by oral contraceptives, intentional self-harm, subsequent encounter
Documentation tips
- Make sure the note supports every element of the title, “Underdosing of insulin and oral hypoglycemic [antidiabetic] drugs, sequela”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to T38.
The international WHO ICD-10 also has T38, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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