Sprain of calcaneofibular ligament of unsp ankle, init

This code signifies a sprain affecting the calcaneofibular ligament, a key stabilizing structure on the lateral side of the ankle. The injury involves the stretching or tearing of the ligament fibers, specifically the one connecting the calcaneus to the fibula, without specifying which ankle is affected.

This code is appropriate for the initial encounter of a patient presenting with a newly diagnosed calcaneofibular ligament sprain. It is commonly used following an inversion injury to the ankle, where the foot rolls inward, stressing the lateral ligaments. Documentation should clearly indicate the calcaneofibular ligament as the affected structure.

• Ensure the documentation specifies "initial encounter" for the treatment of this sprain.
• If the specific ankle (left or right) is known, a more specific code should be used.
• Look for keywords like "inversion injury," "lateral ankle sprain," or direct mention of the calcaneofibular ligament.