ICD-10-CM diagnosis code
T18.8XXS Foreign body in other parts of alimentary tract, 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 T18
45 complete codes in this category.
- T18.4XXAForeign body in colon, initial encounter
- T18.4XXDForeign body in colon, subsequent encounter
- T18.4XXSForeign body in colon, sequela
- T18.5XXAForeign body in anus and rectum, initial encounter
- T18.5XXDForeign body in anus and rectum, subsequent encounter
- T18.5XXSForeign body in anus and rectum, sequela
- T18.8XXAForeign body in other parts of alimentary tract, initial encounter
- T18.8XXDForeign body in other parts of alimentary tract, subsequent encounter
- T18.8XXSForeign body in other parts of alimentary tract, sequela
- T18.9XXAForeign body of alimentary tract, part unspecified, initial encounter
- T18.9XXDForeign body of alimentary tract, part unspecified, subsequent encounter
- T18.9XXSForeign body of alimentary tract, part unspecified, sequela
Documentation tips
- Make sure the note supports every element of the title, “Foreign body in other parts of alimentary tract, 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 T18.
The international WHO ICD-10 also has T18, 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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