S43.122D Dislocation of left acromioclavicular joint, 100%-200% displacement, subsequent encounter

Name of the Condition

• Dislocation of Left Acromioclavicular Joint, 100%-200% Displacement, Subsequent Encounter

Summary

This condition involves a complete dislocation of the left acromioclavicular (AC) joint, where the clavicle is displaced from the acromion of the scapula by 100% to 200% of its normal width. It typically results from trauma and may cause pain, instability, or restricted movement in the shoulder. The "subsequent encounter" designation indicates this is a follow-up visit for the same injury.

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

• 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 function.
• Surgical intervention may be considered for persistent instability or severe cases.
• Pain management with medications or injections.

Prognosis and Follow-Up

Most patients recover with appropriate treatment, though some may experience long-term shoulder instability. Follow-up care is important to monitor healing and adjust treatment plans as needed.

Complications

• Chronic shoulder pain or instability.
• Nerve or blood vessel damage in severe cases.
• Arthritis in the acromioclavicular joint over time.

Lifestyle & Prevention

• Use protective gear during contact sports.
• Avoid activities that strain the shoulder until fully healed.
• Strengthen shoulder muscles through targeted exercises.

When to Seek Professional Help

Seek care if pain worsens, movement is severely limited, or there are signs of infection (e.g., redness, fever).

Tips for Medical Coders

Document the laterality (left), displacement percentage (100%-200%), and encounter type (subsequent) to ensure accurate coding. Include details about the injury mechanism and any imaging results to support the diagnosis.