S42.126 Nondisplaced fracture of acromial process, unspecified shoulder

Name of the Condition

• Nondisplaced fracture of acromial process, unspecified shoulder

Summary

A nondisplaced fracture of the acromial process refers to a break in the bony projection of the scapula (shoulder blade) where the bone fragments remain in their normal alignment. The acromial process forms part of the shoulder's roof and connects to the clavicle, contributing to joint stability. This injury typically results from trauma and may cause pain or limited shoulder function, though the lack of displacement often allows for conservative management.

Causes

Traumatic injury is the primary cause of nondisplaced acromial process fractures. Common mechanisms include direct blows to the shoulder, falls onto the shoulder, or forceful impacts during activities like sports or accidents. Low- to moderate-energy trauma, such as a fall from standing height, is often sufficient to cause this type of fracture.

Risk Factors

• Participation in contact sports or activities with a risk of shoulder impact.
• Osteoporosis or conditions that weaken bone density.
• Advanced age, which may increase susceptibility to fractures from minor trauma.
• Previous shoulder injuries that compromise bone integrity.

Symptoms

• Pain in the shoulder, especially with movement or pressure.
• Swelling, bruising, or tenderness over the acromial process.
• Limited range of motion in the shoulder joint.
• Difficulty lifting or rotating the arm.
• In severe cases, visible deformity or instability may be present.

Diagnosis

Diagnosis begins with a physical examination to assess pain, swelling, and tenderness over the acromial process. Imaging studies, typically X-rays, are used to confirm the fracture and verify that the bone fragments are not displaced. Additional imaging, such as CT scans, may be ordered if the fracture is complex or if soft tissue damage is suspected.

Treatment Options

Treatment for a nondisplaced fracture of the acromial process often involves conservative management, including rest, ice, and pain relief. Immobilization with a sling may be recommended to reduce movement and promote healing. Physical therapy is typically introduced once initial pain subsides to restore range of motion and strength. Surgical intervention is rarely needed unless the fracture is associated with significant soft tissue damage or instability.

Prognosis and Follow-Up

The prognosis for a nondisplaced fracture of the acromial process is generally favorable, with most patients recovering fully within 6 to 8 weeks. Follow-up appointments are important to monitor healing and adjust treatment as needed. Physical therapy may be continued to ensure full functional recovery and prevent long-term stiffness or weakness.

Complications

Complications are uncommon but may include persistent pain, limited shoulder mobility, or delayed union of the fracture. In rare cases, associated soft tissue injuries, such as rotator cuff damage, may occur and require additional treatment.

Lifestyle & Prevention

• Avoid high-impact activities that risk shoulder injury until fully healed.
• Use proper protective gear during sports or work that involves shoulder stress.
• Maintain bone health through adequate calcium and vitamin D intake, especially for those with osteoporosis.
• Practice fall prevention strategies, such as removing tripping hazards at home, to reduce fracture risk.

When to Seek Professional Help

Seek medical attention if you experience severe shoulder pain, swelling, or deformity after an injury. Prompt evaluation is important to rule out more serious fractures or associated injuries. Follow up with a healthcare provider if pain persists or worsens despite initial treatment.

Tips for Medical Coders

When coding for a nondisplaced fracture of the acromial process, use the ICD-10-CM code S42.126. Ensure documentation specifies the fracture is nondisplaced and affects the unspecified shoulder. Include details about the mechanism of injury, symptoms, and any imaging findings to support the diagnosis. Avoid using this code for displaced fractures or fractures involving other parts of the shoulder.