S43.12 Dislocation of acromioclavicular joint, 100%-200% displacement

Name of the Condition

• Dislocation of Acromioclavicular Joint, 100%-200% Displacement

Summary

This condition involves a complete dislocation of the acromioclavicular (AC) joint, where the clavicle is displaced from the acromion of the scapula by 100% to 200% of its normal width. It typically results from trauma and may cause pain, instability, or restricted movement in the shoulder.

Causes

Traumatic events like falls, direct blows to the shoulder, or forceful movements can cause this dislocation. Sports injuries, motor vehicle accidents, or falls are common triggers.

Risk Factors

• Participation in contact sports or activities with high fall risk.
• Previous shoulder injuries or ligamentous instability.
• Age-related degeneration or connective tissue disorders.
• Occupations requiring repetitive arm or shoulder movements.

Symptoms

• Pain and tenderness around the top of the shoulder.
• Visible deformity or swelling over the acromioclavicular joint.
• Limited range of motion in the shoulder.
• Sensation of the joint "popping out" or feeling unstable.

Diagnosis

Diagnosis typically involves a physical examination to assess tenderness, deformity, and range of motion. Imaging tests like X-rays may be used to confirm displacement and rule out fractures.

Treatment Options

• Non-surgical treatments such as rest, ice, and physical therapy to restore movement and strength.
• Surgical options in severe cases to realign the joint and stabilize it.

Prognosis and Follow-Up

Recovery depends on the severity of the injury and treatment approach. Most patients regain function with appropriate care, but follow-up may be needed to monitor healing and prevent complications.

Complications

• Chronic shoulder instability or pain.
• Nerve or vascular damage in severe cases.
• Arthritis in the AC joint over time.

Lifestyle & Prevention

• Use protective gear during contact sports.
• Strengthen shoulder muscles to improve stability.
• Avoid activities that strain the shoulder after injury.

When to Seek Professional Help

Seek medical attention if you experience severe pain, visible deformity, or inability to move the shoulder after an injury.

Tips for Medical Coders

Document the degree of displacement (100%-200%) and any associated injuries. Ensure clinical notes support the specific displacement range for accurate coding.