S42.125K Nondisplaced fracture of acromial process, left shoulder, subsequent encounter for fracture with nonunion

Name of the Condition

• Nondisplaced fracture of acromial process, left shoulder, subsequent encounter for fracture with nonunion

Summary

A nondisplaced fracture of the acromial process of the left shoulder is a break in the bony projection (acromion) of the scapula where the bone fragments remain aligned. The acromial process forms part of the shoulder's roof and connects to the clavicle, contributing to joint stability. This injury is documented as a subsequent encounter for fracture with nonunion, indicating the fracture has not healed properly after an initial treatment phase. The nonunion status may affect shoulder function due to persistent pain or instability, though the bone fragments remain in their original position.

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. The nonunion may result from inadequate immobilization, poor blood supply to the fracture site, or other factors that impede healing during the initial treatment period.

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.
• Factors that impair healing, such as smoking, diabetes, or nutritional deficiencies.

Symptoms

• Persistent pain localized to the top of the left shoulder, especially with movement.
• Swelling, bruising, or tenderness over the acromial area that does not resolve.
• Limited range of motion in the shoulder joint, potentially worsening over time.
• Difficulty lifting or rotating the arm, with symptoms that may not improve with initial treatment.
• In some cases, a visible or palpable gap at the fracture site if nonunion is severe.

Diagnosis

Diagnosis involves a physical examination to assess shoulder function and tenderness, followed by imaging studies. X-rays are typically used to confirm the fracture and evaluate for nonunion, which may show a persistent gap or lack of bone healing. Advanced imaging, such as CT or MRI, may be ordered to assess soft tissue involvement or detailed bone structure. The documentation must specify the nonunion status and that this is a subsequent encounter for the fracture.

Treatment Options

Treatment focuses on promoting healing and restoring function. Options may include immobilization with a sling or brace to reduce stress on the fracture site, physical therapy to maintain mobility and strengthen surrounding muscles, and pain management. In cases of persistent nonunion, surgical intervention, such as bone grafting or fixation, may be considered to stimulate healing. The choice of treatment depends on the severity of the nonunion and the patient's overall health.

Prognosis and Follow-Up

Prognosis varies based on the extent of the nonunion and the effectiveness of treatment. With appropriate management, many patients experience improved pain and function, though full recovery may take longer than with a healing fracture. Regular follow-up appointments are necessary to monitor healing progress, typically with repeat imaging to assess bone union. Long-term outcomes depend on adherence to treatment and addressing any underlying factors that contributed to the nonunion.

Complications

Complications may include chronic pain, persistent shoulder instability, or reduced range of motion if the nonunion is not addressed. In severe cases, arthritis of the acromioclavicular joint or adjacent structures may develop over time. Nerve or blood vessel damage near the fracture site is rare but possible. Surgical interventions carry risks such as infection, hardware failure, or delayed healing.

Lifestyle & Prevention

Lifestyle modifications may include avoiding activities that stress the shoulder until healing is confirmed. Preventive measures focus on reducing fall risk, especially in older adults, and maintaining bone health through adequate nutrition (e.g., calcium and vitamin D) and exercise. For individuals with osteoporosis, targeted therapies may help reduce fracture risk. Proper technique in sports or physical activities can minimize shoulder trauma.

When to Seek Professional Help

Seek medical attention if pain worsens, swelling increases, or movement becomes more limited despite initial treatment. Prompt evaluation is necessary if new symptoms like numbness, tingling, or discoloration of the arm occur, as these may indicate nerve or vascular involvement. Follow-up with a healthcare provider is essential if the fracture does not show signs of healing within the expected timeframe or if functional impairment persists.

Tips for Medical Coders

Document the encounter as a subsequent visit for fracture with nonunion, ensuring the diagnosis specifies the left shoulder and the nonunion status. Include details about the fracture's history, prior treatments, and current clinical findings to support the code. Verify that the encounter is not an initial treatment phase and that the nonunion is clearly documented. Accurate coding requires alignment with the clinical documentation of the fracture's status and the nature of the encounter.