Rupture of synovium, left ankle

This code signifies a tear or break in the synovial membrane surrounding the left ankle joint. This typically results in the leakage of synovial fluid, causing pain, swelling, and impaired joint function. It represents an acute or chronic disruption of the joint capsule's inner lining.

Apply this code when documentation explicitly states a rupture of the synovium affecting the left ankle. This diagnosis is often supported by imaging studies such as MRI, arthroscopy findings, or a clear clinical assessment indicating synovial membrane disruption in the specified joint.

• Ensure laterality is clearly documented as "left ankle"; avoid using for unspecified or right ankle involvement.
• Distinguish from other ankle soft tissue injuries, such as ligamentous tears or tendon ruptures, which have different codes.
• Consider sequencing with external cause codes (e.g., W00-Y38) if the rupture is due to trauma.