M23.42
BillableLoose body in knee, left knee
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A small piece of bone, cartilage, or other tissue that has broken loose and is floating inside the left knee joint.
Coding Tips
- •Use this code when the loose body is specifically documented in the left knee
- •Document the origin of the loose body (post-traumatic, degenerative, etc.) if available for clinical clarity
Code Hierarchy
└M23Internal derangement of knee└M23.4Loose body in knee└M23.42Loose body in knee, left knee
└M23.42Loose body in knee, left knee