M12.26
Header — not billableVillonodular synovitis (pigmented), knee
The ICD-10 code for villonodular synovitis (pigmented), knee is M12.26.
M12.26 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 3 more specific codes below.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- M12.20Villonodular synovitis (pigmented), unspecified site
- M12.21Villonodular synovitis (pigmented), shouldernon-billable header
- M12.22Villonodular synovitis (pigmented), elbownon-billable header
- M12.23Villonodular synovitis (pigmented), wristnon-billable header
- M12.24Villonodular synovitis (pigmented), handnon-billable header
- M12.25Villonodular synovitis (pigmented), hipnon-billable header
- M12.27Villonodular synovitis (pigmented), ankle and footnon-billable header
- M12.28Villonodular synovitis (pigmented), other specified site
- M12.29Villonodular synovitis (pigmented), multiple sites
- M12.26Villonodular synovitis (pigmented), kneenon-billable header