M24.66
Header — not billableAnkylosis, knee
The ICD-10 code for ankylosis, knee is M24.66.
M24.66 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.
Child codes under M24.66
Related codes in this category
- M24.60Ankylosis, unspecified joint
- M24.61Ankylosis, shouldernon-billable header
- M24.62Ankylosis, elbownon-billable header
- M24.63Ankylosis, wristnon-billable header
- M24.64Ankylosis, handnon-billable header
- M24.65Ankylosis, hipnon-billable header
- M24.67Ankylosis, ankle and footnon-billable header
- M24.69Ankylosis, other specified joint
- M24.66Ankylosis, kneenon-billable header