S42.018G Nondisplaced fracture of sternal end of left clavicle, subsequent encounter for fracture with delayed healing

Name of the Condition

• Nondisplaced fracture of sternal end of left clavicle, subsequent encounter for fracture with delayed healing (ICD-10 Code: S42.018G)

Summary

This condition describes a break at the sternal (chest) end of the left clavicle where the bone fragments remain aligned, and healing is progressing more slowly than expected. The fracture is not open to the skin, and this code is used for follow-up care after the initial injury. Delayed healing indicates the fracture site has not fully united within the typical timeframe, requiring ongoing monitoring and management.

Causes

The fracture typically results from direct trauma to the shoulder or chest, such as a fall, accident, or forceful impact. The nondisplaced nature suggests the initial force was not severe enough to shift bone fragments, but factors like poor blood supply, inadequate immobilization, or underlying health conditions may contribute to delayed healing during recovery.

Risk Factors

Factors increasing the risk of delayed healing include advanced age, osteoporosis, smoking, diabetes, or conditions affecting circulation. High-impact activities or inadequate initial treatment (e.g., insufficient immobilization) may also hinder healing progress.

Symptoms

Symptoms often include persistent localized pain at the sternal end of the left clavicle, swelling, and tenderness. The area may feel unstable, and movement of the shoulder or arm could exacerbate discomfort. Bruising or a palpable bump at the fracture site may still be present.

Diagnosis

Diagnosis involves a physical exam to assess pain, stability, and range of motion, followed by imaging (e.g., X-ray, CT, or MRI) to evaluate fracture union. Comparison with prior imaging helps confirm delayed healing by showing insufficient progress in bone repair over time.

Treatment Options

Treatment focuses on promoting healing, such as continued immobilization (e.g., sling), pain management, and physical therapy to restore function. In some cases, additional interventions like bone stimulation or surgery may be considered if healing does not improve.

Prognosis and Follow-Up

Most nondisplaced fractures eventually heal, but delayed healing requires extended monitoring. Follow-up appointments with imaging are typical to assess progress. Full recovery may take longer, and activity modifications are often recommended until the fracture is stable.

Complications

Potential complications include nonunion (failure to heal), malunion (misaligned healing), or persistent pain. Nerve or blood vessel injury near the clavicle is rare but possible. Infection risk is low unless the fracture was open initially.

Lifestyle & Prevention

Avoid activities that stress the shoulder or clavicle until healing is confirmed. Maintain a balanced diet rich in calcium and vitamin D to support bone health. For high-risk individuals, protective gear during sports or fall prevention measures (e.g., home modifications) may reduce injury likelihood.

When to Seek Professional Help

Seek care if pain worsens, swelling increases, or new symptoms (e.g., numbness, discoloration) develop. Persistent instability or inability to bear weight on the affected arm also warrants evaluation to rule out complications.

Tips for Medical Coders

Use this code for a subsequent encounter (after active treatment ended) when the fracture is healing slowly. Document the fracture’s location (left sternal end), nondisplaced status, and evidence of delayed healing (e.g., imaging showing insufficient union). Ensure the encounter is for fracture care, not unrelated issues.