M24.66
M24.66: Ankylosis, knee
Non-billable headerICD-10-CM
M24.66 is a non-billable header ICD-10-CM code for ankylosis, knee. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1 inherited from the categories above M24.66
A category’s note binds every code beneath it.
Written on M24: Other specific joint derangements
- current injury - see injury of joint by body region
Excludes2 inherited from the categories above M24.66
Not part of this code, but both may be coded when both are present.
Other codes that can never be billed with M24.66
Their own Excludes1 notes name this code, so the conflict is not listed above.
- M23Internal derangement of knee
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead M24.66
3 child codes. Green means billable.