ICD-10-CM diagnosis code
M89.379 Hypertrophy of bone, unspecified ankle and foot
- Billable
- Yes, a complete code (FY2026)
- Category
- M89 Other disorders of bone
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Other codes in M89
222 complete codes in this category.
- M89.362Hypertrophy of bone, left tibia
- M89.363Hypertrophy of bone, right fibula
- M89.364Hypertrophy of bone, left fibula
- M89.369Hypertrophy of bone, unspecified tibia and fibula
- M89.371Hypertrophy of bone, right ankle and foot
- M89.372Hypertrophy of bone, left ankle and foot
- M89.379Hypertrophy of bone, unspecified ankle and foot
- M89.38Hypertrophy of bone, other site
- M89.39Hypertrophy of bone, multiple sites
- M89.40Other hypertrophic osteoarthropathy, unspecified site
- M89.411Other hypertrophic osteoarthropathy, right shoulder
- M89.412Other hypertrophic osteoarthropathy, left shoulder
Documentation tips
- Make sure the note supports every element of the title, “Hypertrophy of bone, unspecified ankle and foot”: 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 M89.
The international WHO ICD-10 also has M89, 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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