ICD-10-CM diagnosis code
H61.812 Exostosis of left external canal
- Billable
- Yes, a complete code (FY2026)
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Other codes in H61
64 complete codes in this category.
- H61.329Acquired stenosis of external ear canal secondary to inflammation and infection, unspecified ear
- H61.391Other acquired stenosis of right external ear canal
- H61.392Other acquired stenosis of left external ear canal
- H61.393Other acquired stenosis of external ear canal, bilateral
- H61.399Other acquired stenosis of external ear canal, unspecified ear
- H61.811Exostosis of right external canal
- H61.812Exostosis of left external canal
- H61.813Exostosis of external canal, bilateral
- H61.819Exostosis of external canal, unspecified ear
- H61.891Other specified disorders of right external ear
- H61.892Other specified disorders of left external ear
- H61.893Other specified disorders of external ear, bilateral
Documentation tips
- Make sure the note supports every element of the title, “Exostosis of left external canal”: 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 H61.
The international WHO ICD-10 also has H61, 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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