S43.141A Inferior dislocation of right acromioclavicular joint, initial encounter

Name of the Condition

• Inferior Dislocation of Right Acromioclavicular Joint, Initial Encounter

Summary

This condition involves the inferior (downward) displacement of the right acromioclavicular (AC) joint, where the clavicle meets the acromion of the scapula. It is a specific type of shoulder injury resulting from trauma and is classified as an initial encounter, indicating recent onset. The injury may cause pain, instability, or restricted movement in the affected shoulder.

Causes

Traumatic events such as falls, direct blows to the shoulder, or forceful movements can cause inferior dislocation of the AC joint. Sports injuries, motor vehicle accidents, or falls onto an outstretched hand are common triggers. The mechanism typically involves significant force applied to the shoulder, leading to the clavicle displacing downward relative to the acromion.

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 right 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 inferior displacement and rule out fractures. The initial encounter classification indicates the condition is being evaluated for the first time.

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 approach. Most patients recover with conservative management, but severe cases may require surgery. Follow-up care includes monitoring for stability and gradual return to activity, with imaging or physical exams as needed.

Complications

• Chronic shoulder instability or recurrent dislocation.
• Nerve or vascular damage in severe cases.
• Persistent pain or limited mobility if untreated.

Lifestyle & Prevention

• Avoid high-risk activities or use protective gear during sports.
• Strengthen shoulder muscles through targeted exercises.
• Maintain proper posture and avoid repetitive overhead movements.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, visible deformity, or inability to move the shoulder after an injury. Persistent symptoms or worsening pain also warrant evaluation.

Tips for Medical Coders

Document the specific side (right), direction (inferior), and encounter type (initial) to ensure accurate coding. Include details of the injury mechanism, physical exam findings, and imaging results to support the diagnosis.