S43.13 Dislocation of acromioclavicular joint, greater than 200% displacement

Name of the Condition

• Dislocation of Acromioclavicular Joint, Greater Than 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 more than 200%. It typically results from significant trauma and may cause severe 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

• Severe 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

Prognosis depends on the severity of the injury and treatment. Most patients recover with appropriate care, but follow-up is important to monitor healing and prevent complications.

Complications

• Chronic shoulder instability.
• Nerve or blood vessel damage.
• Arthritis in the AC joint over time.

Lifestyle & Prevention

• Avoid high-risk activities or use protective gear.
• Strengthen shoulder muscles through exercise.
• Maintain proper posture and body mechanics.

When to Seek Professional Help

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

Tips for Medical Coders

Document the degree of displacement (greater than 200%) and any associated injuries. Ensure clinical notes support the diagnosis for accurate coding.