S43.111A Subluxation of right acromioclavicular joint, initial encounter

Name of the Condition

• Subluxation of Right Acromioclavicular Joint, Initial Encounter

Summary

This condition involves the partial displacement of the right acromioclavicular (AC) joint, where the clavicle meets the acromion of the scapula. It is an initial encounter injury typically resulting from trauma, causing pain, instability, or restricted shoulder movement.

Causes

Traumatic events such as falls, direct blows to the shoulder, or forceful movements can cause subluxation. 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 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 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 using hardware or fixation devices.

Prognosis and Follow-Up

With appropriate treatment, many recover fully. Follow-up care may include physical therapy to restore strength and mobility, with regular monitoring to ensure proper healing and prevent recurrence.

Complications

• Chronic shoulder instability or recurrent subluxation.
• Persistent pain or reduced range of motion.
• Nerve or vascular damage in severe cases.
• Post-traumatic arthritis over time.

Lifestyle & Prevention

• Use protective gear during contact sports.
• Strengthen shoulder muscles through targeted exercises.
• Avoid activities that strain the AC joint until fully healed.
• Maintain proper posture and body mechanics to reduce injury risk.

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/vascular compromise (e.g., numbness, discoloration).

Tips for Medical Coders

Document the laterality (right) and encounter type (initial) clearly. Include details on trauma mechanism, physical exam findings, and imaging results to support the diagnosis. Ensure the "initial encounter" designation is used for acute, active treatment episodes.