ICD-10-CM diagnosis code
M86.179 Other acute osteomyelitis, unspecified ankle and foot
- Billable
- Yes, a complete code (FY2026)
- Category
- M86 Osteomyelitis
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Other codes in M86
179 complete codes in this category.
- M86.159Other acute osteomyelitis, unspecified femur
- M86.161Other acute osteomyelitis, right tibia and fibula
- M86.162Other acute osteomyelitis, left tibia and fibula
- M86.169Other acute osteomyelitis, unspecified tibia and fibula
- M86.171Other acute osteomyelitis, right ankle and foot
- M86.172Other acute osteomyelitis, left ankle and foot
- M86.179Other acute osteomyelitis, unspecified ankle and foot
- M86.18Other acute osteomyelitis, other site
- M86.19Other acute osteomyelitis, multiple sites
- M86.20Subacute osteomyelitis, unspecified site
- M86.211Subacute osteomyelitis, right shoulder
- M86.212Subacute osteomyelitis, left shoulder
Documentation tips
- Make sure the note supports every element of the title, “Other acute osteomyelitis, 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 M86.
The international WHO ICD-10 also has M86, 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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