Loose body in left ankle

This code signifies the presence of a detached fragment of cartilage or bone within the synovial joint space of the left ankle. This loose body can cause mechanical symptoms such as locking, catching, pain, and effusion, impairing normal ankle function.

Apply this code when documentation explicitly states a loose body is identified in the left ankle joint. This often occurs following trauma, degenerative changes, or osteochondritis dissecans. Supporting documentation includes imaging reports (X-ray, MRI, CT) confirming the presence and location of the loose body, and physician notes detailing associated symptoms and findings.

• Ensure laterality is accurately documented and coded (left vs. right vs. bilateral).
• Do not confuse with foreign body (e.g., splinter) which would use a different code series.
• Code any underlying condition (e.g., osteochondritis dissecans) as a primary diagnosis if it is the cause of the loose body.