Sprain of left acromioclavicular joint, initial encounter

This code signifies an injury to the ligaments connecting the acromion (part of the shoulder blade) and the clavicle (collarbone) on the patient's left side. This type of sprain involves stretching or tearing of these stabilizing ligaments, often resulting from a direct blow or fall onto the shoulder.

Apply this code when documenting an initial diagnosis of a sprain affecting the left acromioclavicular joint. This is appropriate for patients presenting with acute shoulder pain, tenderness, and possibly deformity following a traumatic event. It should be used for the first time the patient is seen for this specific injury.

• Ensure documentation clearly specifies the left side and confirms the injury is a sprain of the AC joint.
• The "A" in the seventh character indicates an "initial encounter" for this injury, meaning the patient is receiving active treatment.
• Distinguish from dislocations (S43.12-) or other shoulder joint sprains (S43.82-).