ICD-10-CM diagnosis code
M87.871 Other osteonecrosis, right ankle
- Billable
- Yes, a complete code (FY2026)
- Category
- M87 Osteonecrosis
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Other codes in M87
217 complete codes in this category.
- M87.861Other osteonecrosis, right tibia
- M87.862Other osteonecrosis, left tibia
- M87.863Other osteonecrosis, unspecified tibia
- M87.864Other osteonecrosis, right fibula
- M87.865Other osteonecrosis, left fibula
- M87.869Other osteonecrosis, unspecified fibula
- M87.871Other osteonecrosis, right ankle
- M87.872Other osteonecrosis, left ankle
- M87.873Other osteonecrosis, unspecified ankle
- M87.874Other osteonecrosis, right foot
- M87.875Other osteonecrosis, left foot
- M87.876Other osteonecrosis, unspecified foot
Documentation tips
- Make sure the note supports every element of the title, “Other osteonecrosis, right ankle”: 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 M87.
The international WHO ICD-10 also has M87, 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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