S43.139 Dislocation of unspecified acromioclavicular joint, greater than 200% displacement

Name of the Condition

• Dislocation of Unspecified 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.
• Surgical intervention for severe cases or persistent instability.
• Pain management with medications or injections.

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 imaging or physical therapy may be needed to monitor healing and prevent recurrence.

Complications

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

Lifestyle & Prevention

• Use protective gear during contact sports.
• Avoid high-risk activities if previous shoulder injuries exist.
• Strengthen shoulder muscles through targeted exercises.
• Maintain proper posture and body mechanics.

When to Seek Professional Help

Seek immediate medical attention if you experience severe shoulder pain, visible deformity, or inability to move the arm after trauma. Persistent pain or instability after initial treatment also warrants evaluation.

Tips for Medical Coders

Document the side (unspecified) and displacement percentage (>200%) clearly. Ensure clinical notes support the diagnosis and specify if the injury is acute or chronic. Use this code only when the acromioclavicular joint dislocation is confirmed and displacement exceeds 200%.