S43.152 Posterior dislocation of left acromioclavicular joint

Name of the Condition

• Posterior Dislocation of Left Acromioclavicular Joint

Summary

This condition involves the displacement of the left acromioclavicular (AC) joint, where the clavicle moves backward relative to the acromion of the scapula. It is a type of shoulder injury that typically results from trauma and may cause pain, instability, or restricted movement.

Causes

Traumatic events such as falls, direct blows to the shoulder, or forceful movements can lead to posterior 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 left 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.
• Medications for pain and inflammation management.
• Surgical intervention may be considered for severe cases or persistent instability.

Prognosis and Follow-Up

Most patients recover with appropriate treatment, though recovery time varies. Follow-up care may include physical therapy to regain function and regular monitoring for complications. Return to normal activities depends on the severity of the injury and adherence to treatment.

Complications

• Chronic shoulder instability or recurrent dislocation.
• Nerve or blood vessel damage in severe cases.
• Persistent pain or limited mobility if not properly managed.

Lifestyle & Prevention

• Use protective gear during contact sports.
• Avoid falls by maintaining balance and using assistive devices if needed.
• Strengthen shoulder muscles through regular exercise to improve stability.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, visible deformity, inability to move the shoulder, or signs of nerve damage (e.g., numbness, tingling).

Tips for Medical Coders

Document the laterality (left) and the posterior dislocation of the acromioclavicular joint. Ensure clinical documentation supports the diagnosis and any associated injuries or treatments to justify code assignment.