S42.019 Nondisplaced fracture of sternal end of unspecified clavicle

Name of the Condition

• Nondisplaced fracture of sternal end of unspecified clavicle (ICD-10 Code: S42.019)

Summary

A nondisplaced fracture of the sternal end of the clavicle is a break in the inner portion of the collarbone, where it connects to the sternum (breastbone). This type of fracture involves the medial third of the clavicle and is characterized by the bone remaining in its normal anatomical position without shifting or misalignment. It may range from minor cracks to complete breaks that do not alter the bone’s alignment.

Causes

This fracture typically results from direct trauma to the shoulder or chest, such as a fall onto the shoulder, a motor vehicle accident, or a forceful impact to the sternum. It can also occur during contact sports or activities involving sudden force to the upper body. The nondisplaced nature suggests the force was not severe enough to shift the bone fragments.

Risk Factors

Factors that increase the risk include participation in high-impact sports, osteoporosis or reduced bone density, and older age due to increased fall risk. Anatomical variations in clavicle structure may also play a role. The unspecified side indicates the fracture could affect either the right or left clavicle, depending on the trauma.

Symptoms

Symptoms often include localized pain at the sternal end of the clavicle, swelling, bruising, tenderness, and difficulty moving the shoulder. A visible deformity or bump may be present at the fracture site, though less pronounced than in displaced fractures. Pain may worsen with movement or pressure.

Diagnosis

Diagnosis involves a physical examination to assess pain and deformity, followed by X-ray imaging to confirm the fracture and its location. Additional imaging like CT or MRI may be used for complex cases, though nondisplaced fractures are typically visible on standard X-rays. The "unspecified" designation reflects the lack of documentation specifying the side (right or left).

Treatment Options

Treatment typically includes immobilization with a sling or brace to limit shoulder movement and reduce pain. Pain management with over-the-counter or prescription medications may be recommended. Most nondisplaced fractures heal without surgery, with follow-up imaging to monitor healing progress. Physical therapy may be advised to restore strength and mobility once pain subsides.

Prognosis and Follow-Up

Prognosis is generally favorable for nondisplaced fractures, as they often heal within 6–8 weeks with proper immobilization. Follow-up appointments are important to assess healing and adjust treatment. Most patients regain full function, though mild discomfort or stiffness may persist temporarily. Regular monitoring ensures no displacement occurs during healing.

Complications

Complications are rare but may include delayed healing, nonunion (failure to heal), or malunion (healing in an abnormal position). Nerve or blood vessel injury near the fracture site is uncommon but possible. Infection risk is low unless the fracture is open (exposed to the skin). Persistent pain or functional limitations may require further evaluation.

Lifestyle & Prevention

Preventive measures include using protective gear during contact sports, improving bone health with calcium and vitamin D, and avoiding high-risk activities. Strengthening shoulder and upper body muscles can help absorb impact. Fall prevention strategies, such as home modifications, are beneficial for older adults.

When to Seek Professional Help

Seek immediate care if pain is severe, swelling worsens, or a deformity becomes more pronounced. Signs of infection (redness, pus, fever) or numbness/tingling in the arm require prompt evaluation. Follow up with a healthcare provider if pain persists beyond a few weeks or if mobility does not improve.

Tips for Medical Coders

Document the fracture as "nondisplaced" and specify the side (right/left) when known. Use S42.019 only when the side is not documented. Ensure trauma details (e.g., fall, accident) are recorded to support the diagnosis. Verify that imaging confirms the fracture location and nondisplaced status to justify code selection.