M84.31 Stress fracture, shoulder

Name of the Condition

• Stress Fracture, Shoulder

Summary

A stress fracture of the shoulder is a small crack or severe bruising within a shoulder bone, typically resulting from repetitive force or overuse. This injury occurs when the bone's ability to repair itself is exceeded by mechanical stress, often affecting bones like the humerus or scapula.

Causes

Stress fractures develop due to repeated mechanical stress on a shoulder bone that outpaces its natural repair process. Common causes include increased physical activity, improper training techniques, and inadequate rest between activities.

Risk Factors

• Participation in high-impact sports (e.g., throwing, swimming)
• Sudden increase in physical activity level
• Poor nutrition, including insufficient calcium or vitamin D
• Low bone density or osteoporosis
• Overuse from repetitive overhead motions

Symptoms

• Pain in the shoulder that worsens with activity
• Swelling and tenderness around the fracture site
• Pain that diminishes with rest
• Limited range of motion in the shoulder

Diagnosis

Diagnosis involves a physical examination by a healthcare provider, followed by imaging tests such as X-rays, MRI, or bone scans to confirm the fracture. Early stress fractures may not be visible on standard X-rays.

Treatment Options

• Rest and avoiding activities that exacerbate the injury
• Ice application to reduce swelling and pain
• Protective braces or slings to stabilize the shoulder
• Gradual return to activity with proper conditioning
• Physical therapy to restore strength and mobility

Prognosis and Follow-Up

Most stress fractures of the shoulder heal with appropriate rest and treatment. Recovery time varies but typically ranges from 4 to 8 weeks. Follow-up care may include monitoring for healing progress and adjusting activity levels to prevent recurrence.

Complications

• Delayed healing or nonunion if not properly treated
• Chronic pain or instability in the shoulder
• Risk of complete fracture with continued overuse

Lifestyle & Prevention

• Gradually increase physical activity to avoid overuse
• Ensure proper nutrition, including adequate calcium and vitamin D
• Use proper technique during sports or repetitive motions
• Incorporate strength training to support shoulder muscles
• Take regular breaks during prolonged overhead activities

When to Seek Professional Help

Seek medical attention if shoulder pain persists despite rest, worsens, or is accompanied by swelling, bruising, or difficulty moving the arm. Immediate care is needed if a complete fracture is suspected.

Tips for Medical Coders

Document the specific shoulder bone involved (e.g., humerus, scapula) when available to support accurate coding. For M84.31, ensure the fracture is clearly identified as a stress fracture of the shoulder, with no conflicting documentation of acute trauma or other fracture types.