S82.445K Nondisplaced spiral fracture of shaft of left fibula, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Nondisplaced spiral fracture of shaft of left fibula, subsequent encounter for closed fracture with nonunion

Summary

A nondisplaced spiral fracture of the left fibula's shaft with nonunion is a bone break characterized by a helical pattern along the fibular shaft, where the bone fragments remain in normal anatomical alignment but have failed to heal properly. This fracture typically results from twisting forces applied to the leg and may cause persistent pain and limited mobility. The "subsequent encounter" and "closed fracture with nonunion" descriptors indicate this is a follow-up visit for a fracture that has not united after an expected healing period, without an open wound.

Causes

Most commonly caused by twisting injuries to the lower leg, such as those sustained during sports, falls, or accidents. High-impact trauma, including direct blows or rotational forces, can also lead to this type of fracture. Nonunion may result from inadequate immobilization, poor blood supply to the fracture site, or excessive movement during healing.

Risk Factors

• Participation in activities with high rotational stress (e.g., skiing, gymnastics).
• Osteoporosis or reduced bone density.
• Previous lower leg injuries or fractures.
• Advanced age, which may weaken bone strength.
• Smoking or other factors that impair bone healing.

Symptoms

• Persistent pain and swelling in the lower leg.
• Bruising and tenderness at the fracture site.
• Inability to bear weight on the affected leg.
• Possible instability or deformity of the leg.

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and deformity. X-rays are typically used to confirm the fracture and its spiral pattern, as well as to evaluate for nonunion (e.g., visible gap between bone fragments or lack of callus formation). Additional imaging, such as CT or MRI, may be ordered to assess bone healing and soft tissue involvement.

Treatment Options

Treatment may include immobilization with a cast or brace to stabilize the fracture, pain management, and physical therapy to restore function. Surgical intervention, such as bone grafting or internal fixation, may be considered if nonunion persists or causes significant symptoms.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and response to treatment. Follow-up care is essential to monitor healing progress, with regular imaging to assess bone union. Long-term outcomes may vary, with some patients experiencing full recovery and others requiring ongoing management.

Complications

• Chronic pain or instability.
• Delayed or failed healing (nonunion).
• Infection (if surgical intervention is required).
• Reduced mobility or functional impairment.

Lifestyle & Prevention

• Avoid high-impact activities that stress the lower leg.
• Maintain bone health through adequate nutrition (e.g., calcium, vitamin D) and exercise.
• Use protective gear during sports or activities with rotational risk.
• Follow post-injury care instructions to promote healing.

When to Seek Professional Help

Seek medical attention if you experience persistent pain, swelling, or inability to bear weight after a leg injury, or if symptoms worsen despite initial treatment.

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with nonunion. Include details on the fracture's location (left fibula shaft), pattern (spiral), and healing status (nonunion). Ensure documentation supports the "subsequent encounter" and "closed fracture" descriptors, with no open wound or infection noted.