S43.151S Posterior dislocation of right acromioclavicular joint, sequela

Name of the Condition

• Posterior Dislocation of Right Acromioclavicular Joint, Sequela

Summary

This condition represents the residual effects of a prior posterior dislocation of the right acromioclavicular (AC) joint. It involves the clavicle remaining displaced backward relative to the acromion of the scapula, leading to persistent symptoms or structural changes after the initial injury has healed.

Causes

Posterior dislocation of the AC joint typically results from trauma, such as falls, direct shoulder impacts, or forceful movements. The sequela arises when the joint does not fully resolve or stabilizes in a displaced position, often due to incomplete healing or ligamentous damage.

Risk Factors

• Previous shoulder trauma or AC joint injury.
• Inadequate rehabilitation following initial dislocation.
• Ligamentous laxity or connective tissue disorders.
• Activities or occupations involving repetitive shoulder stress.

Symptoms

• Chronic pain or discomfort at the top of the shoulder.
• Persistent swelling or deformity over the AC joint.
• Reduced shoulder range of motion or instability.
• Sensation of joint "giving way" during movement.

Diagnosis

Diagnosis relies on clinical evaluation of residual symptoms and physical examination findings. Imaging, such as X-rays or MRI, may be used to assess joint alignment and identify chronic changes or associated damage.

Treatment Options

• Conservative management with physical therapy to improve strength and stability.
• Pain relief through medications or injections.
• Surgical intervention for severe instability or functional impairment.
• Activity modification to avoid aggravating movements.

Prognosis and Follow-Up

Prognosis depends on the extent of residual damage and adherence to treatment. Regular follow-up ensures monitoring of symptoms and functional recovery. Long-term outcomes may include persistent mild discomfort or occasional instability.

Complications

• Chronic shoulder pain or arthritis in the AC joint.
• Recurrent instability or subluxation.
• Nerve or vascular compression from persistent displacement.
• Reduced shoulder function affecting daily activities.

Lifestyle & Prevention

• Engage in targeted shoulder strengthening exercises.
• Use protective gear during high-risk activities.
• Avoid repetitive overhead movements or heavy lifting.
• Maintain flexibility through regular stretching.

When to Seek Professional Help

Seek care if symptoms worsen, new pain or deformity develops, or shoulder function declines. Prompt evaluation is important for managing complications or adjusting treatment plans.

Tips for Medical Coders

Document the sequela status and specify the right-sided involvement. Ensure clinical notes reflect the residual effects of the prior dislocation, including any chronic symptoms or structural changes. Code S43.151S is appropriate for sequela of posterior dislocation of the right AC joint.