Rupture of synovium, right toe(s)

This code signifies a spontaneous or traumatic tear in the synovial membrane of the right toe joint(s). This rupture can lead to the leakage of synovial fluid, causing pain, swelling, and impaired joint function. It differentiates from a complete tendon rupture, focusing specifically on the synovial lining.

Apply this code when documentation explicitly states a rupture of the synovium affecting the right toe(s). This typically occurs following acute trauma, repetitive stress, or in the context of inflammatory conditions. Supporting documentation should include physician notes detailing the location (right toe), the nature of the injury (rupture of synovium), and the mechanism if known.

• Ensure the documentation specifies "rupture of synovium" and not a sprain or strain of ligaments or tendons.
• Verify laterality is clearly documented as "right toe(s)."
• Distinguish from M66.171 (left toe(s)) and M66.179 (unspecified toe(s)) to ensure accurate laterality assignment.