S42.123K Displaced fracture of acromial process, unspecified shoulder, subsequent encounter for fracture with nonunion

Name of the Condition

• Displaced fracture of acromial process, unspecified shoulder, subsequent encounter for fracture with nonunion

Summary

A displaced fracture of the acromial process, unspecified shoulder, subsequent encounter for fracture with nonunion, refers to a break in the bony projection (acromion) of the scapula where the bone fragments remain misaligned and have failed to heal properly. The acromial process forms part of the shoulder's roof and connects to the clavicle, contributing to joint stability. This condition occurs after initial treatment and indicates that the fracture site has not united, potentially affecting shoulder function due to persistent misalignment or associated soft tissue damage.

Causes

Traumatic injury is the primary cause, often from a direct blow to the shoulder, a fall onto the shoulder, or a forceful impact during activities like sports or accidents. High-energy events, such as motor vehicle collisions, can also lead to this type of fracture. Nonunion may result from inadequate immobilization, poor blood supply to the fracture site, infection, or excessive movement during healing.

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.
• Smoking or other factors that impair bone healing.

Symptoms

• Persistent pain localized to the top of the shoulder, especially with movement.
• Swelling, bruising, or tenderness over the acromial area.
• Limited range of motion in the shoulder joint.
• Difficulty lifting or rotating the arm.
• Possible clicking or grinding sensation during shoulder movement.

Diagnosis

Diagnosis involves a physical examination to assess shoulder function and tenderness, followed by imaging studies such as X-rays or CT scans to confirm the fracture and evaluate for nonunion. Additional tests, like bone scans or MRI, may be used to assess blood flow and tissue healing. Clinical history, including prior treatment and time since injury, is also considered.

Treatment Options

Treatment may include surgical intervention to realign and stabilize the fracture, such as open reduction and internal fixation, or bone grafting to promote healing. Non-surgical options, like prolonged immobilization or electrical stimulation, may be considered for select cases. Physical therapy is often recommended to restore function and strength.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion, overall health, and response to treatment. Follow-up care typically involves regular imaging to monitor healing and functional assessments. Long-term outcomes may include persistent pain or reduced shoulder mobility, but many patients achieve improved function with appropriate management.

Complications

• Chronic pain or discomfort.
• Persistent shoulder instability.
• Limited range of motion or stiffness.
• Infection, particularly if surgery is performed.
• Nerve or blood vessel damage near the fracture site.

Lifestyle & Prevention

• Avoid high-impact activities that risk shoulder injury.
• Maintain bone health through adequate nutrition and exercise.
• Use protective gear during sports or work activities.
• Follow post-injury care instructions to support healing.
• Quit smoking to improve bone healing potential.

When to Seek Professional Help

Seek medical attention if you experience severe or worsening shoulder pain, inability to move the arm, visible deformity, or signs of infection (e.g., fever, redness, drainage). Prompt evaluation is important for fractures that fail to heal or require further intervention.

Tips for Medical Coders

This code is used for a subsequent encounter for a displaced acromial process fracture with nonunion. Documentation should specify the fracture's displacement, the shoulder involved, and the nonunion status. Ensure the encounter is subsequent (not initial) and that the fracture is confirmed as nonunion, typically supported by imaging or clinical findings.