Posterior dislocation of unsp acromioclavicular joint, init

This code signifies a posterior displacement of the acromioclavicular (AC) joint, where the clavicle is dislocated backward relative to the acromion, and the specific side (left or right) is not documented. This injury typically involves damage to the AC ligaments and potentially the coracoclavicular ligaments.

Apply this code when documentation clearly indicates a posterior dislocation of the AC joint, but the laterality (left or right shoulder) is not specified. This is commonly seen following direct trauma to the shoulder, such as a fall onto the point of the shoulder or a direct blow.

• Ensure the documentation explicitly states "posterior dislocation" of the AC joint.
• Only use this code when the laterality is truly unspecified; if laterality is mentioned, use the more specific code.
• The "A" suffix indicates an initial encounter for active treatment of the injury.