S42.015 Posterior displaced fracture of sternal end of left clavicle

Name of the Condition

• Posterior displaced fracture of sternal end of left clavicle (ICD-10 Code: S42.015)

Summary

This condition involves a break at the sternal (chest) end of the left clavicle, with the bone fragment displaced backward. The clavicle, or collarbone, connects the arm to the body and is a common site for fractures due to its exposed position. Displacement indicates the bone fragments are not aligned, which may affect healing and require specific management.

Causes

Fractures of the clavicle’s sternal end typically result from direct trauma to the shoulder or chest, such as a fall onto the shoulder, a blow to the chest, or a motor vehicle accident. The posterior displacement specifically occurs when the fracture fragment moves toward the back of the body.

Risk Factors

Factors increasing the risk include participation in contact sports, osteoporosis or reduced bone density, and activities with a high risk of falls or collisions. Older adults may be more susceptible due to age-related bone changes.

Symptoms

Symptoms often include sudden pain at the sternal end of the left clavicle, swelling, bruising, and tenderness. A visible or palpable deformity may be present, along with difficulty moving the shoulder or arm due to pain.

Diagnosis

Diagnosis begins with a physical examination to assess pain, swelling, and deformity. X-ray imaging is typically used to confirm the fracture and its displacement. Additional imaging like CT or MRI may be employed for complex cases or to evaluate surrounding structures.

Treatment Options

Treatment depends on the severity of displacement and patient factors. Non-displaced or minimally displaced fractures may be managed with immobilization (e.g., a sling) and pain relief. Displaced fractures might require closed reduction (realignment without surgery) or, in some cases, surgical fixation to restore alignment and stability.

Prognosis and Follow-Up

Most fractures heal within 6–12 weeks with appropriate treatment. Follow-up appointments monitor healing progress, often via repeat imaging. Physical therapy may be recommended to restore strength and range of motion. Complications like nonunion or malunion are possible but uncommon with proper care.

Complications

Potential complications include nonunion (failure to heal), malunion (healing in an incorrect position), nerve or blood vessel injury near the fracture site, or chronic pain. Infection is rare but possible with surgical intervention.

Lifestyle & Prevention

Preventive measures include using protective gear during contact sports, maintaining bone health through adequate calcium and vitamin D intake, and avoiding high-risk activities. Strengthening shoulder and upper body muscles may help reduce injury risk.

When to Seek Professional Help

Seek immediate medical attention for severe pain, visible deformity, inability to move the arm, or signs of nerve/vessel damage (e.g., numbness, discoloration). Follow up with a healthcare provider if pain worsens, swelling persists, or mobility does not improve with treatment.

Tips for Medical Coders

Document the laterality (left), displacement direction (posterior), and fracture location (sternal end of clavicle) to accurately assign S42.015. Ensure clinical notes specify displacement and exclude other clavicle fracture types (e.g., midshaft) to support code specificity.