ICD-10-CM diagnosis code
M12.869 Other specific arthropathies, not elsewhere classified, unspecified knee
- Billable
- Yes, a complete code (FY2026)
- Category
- M12 Other specific arthropathies
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Other codes in M12
169 complete codes in this category.
- M12.849Other specific arthropathies, not elsewhere classified, unspecified hand
- M12.851Other specific arthropathies, not elsewhere classified, right hip
- M12.852Other specific arthropathies, not elsewhere classified, left hip
- M12.859Other specific arthropathies, not elsewhere classified, unspecified hip
- M12.861Other specific arthropathies, not elsewhere classified, right knee
- M12.862Other specific arthropathies, not elsewhere classified, left knee
- M12.869Other specific arthropathies, not elsewhere classified, unspecified knee
- M12.871Other specific arthropathies, not elsewhere classified, right ankle and foot
- M12.872Other specific arthropathies, not elsewhere classified, left ankle and foot
- M12.879Other specific arthropathies, not elsewhere classified, unspecified ankle and foot
- M12.88Other specific arthropathies, not elsewhere classified, other specified site
- M12.89Other specific arthropathies, not elsewhere classified, multiple sites
Documentation tips
- Make sure the note supports every element of the title, “Other specific arthropathies, not elsewhere classified, unspecified knee”: 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 M12.
The international WHO ICD-10 also has M12, 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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