S82.422K Displaced transverse fracture of shaft of left fibula, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Displaced transverse fracture of shaft of left fibula, subsequent encounter for closed fracture with nonunion
• ICD-10 Code: S82.422K

Summary

A displaced transverse fracture of the shaft of the left fibula is a break in the long, thin bone on the lateral side of the lower leg, where the bone fragments are separated and misaligned. The fracture line runs horizontally across the bone. This code represents a subsequent encounter for a closed fracture that has failed to heal (nonunion) after an initial treatment period.

Causes

Most commonly caused by direct trauma or high-impact forces to the leg, such as falls, sports injuries, or motor vehicle accidents. Twisting motions or sudden impacts can also lead to this type of fracture. Nonunion may result from inadequate immobilization, poor blood supply to the bone, infection, or excessive movement at the fracture site during healing.

Risk Factors

• Participation in contact sports or high-impact activities.
• Osteoporosis or reduced bone density, which increases fragility.
• Advanced age, which may weaken bone strength.
• Previous leg injuries or surgeries.
• Smoking or other factors that impair bone healing.

Symptoms

• Persistent pain and swelling in the lower leg, often lasting beyond the typical healing period.
• Difficulty bearing weight on the affected leg.
• Bruising or tenderness around the injured area.
• Possible deformity or instability of the leg structure.
• No visible signs of healing on imaging after several months.

Diagnosis

Diagnosis involves a physical examination by a healthcare professional to assess tenderness, swelling, and deformity. Imaging tests, such as X-rays or CT scans, are typically used to confirm the fracture, evaluate the degree of displacement, and assess for nonunion (e.g., a persistent fracture line with no bridging bone). Additional tests may include bone scans or MRI to evaluate blood flow and healing potential.

Treatment Options

Treatment depends on the severity of the nonunion and patient factors. Options may include surgical intervention (e.g., internal fixation with plates or screws, bone grafting to stimulate healing) or continued non-surgical management with immobilization and monitoring. Physical therapy may be recommended to restore function and strength.

Prognosis and Follow-Up

Prognosis varies based on the fracture's characteristics and treatment. Nonunion fractures may require extended healing time or additional interventions. Regular follow-up with imaging is typically needed to monitor progress. Full recovery may take several months to a year, with some patients experiencing residual pain or functional limitations.

Complications

• Chronic pain or discomfort.
• Persistent instability or deformity.
• Increased risk of future fractures.
• Potential need for additional surgeries.
• Long-term mobility limitations.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Follow prescribed weight-bearing restrictions and immobilization guidelines.
• Maintain a balanced diet rich in calcium and vitamin D to support bone health.
• Quit smoking, as it impairs bone healing.
• Use protective equipment during sports or activities with fall risks.

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Sudden, severe pain or swelling.
• Inability to bear weight on the leg.
• Visible deformity or instability.
• Signs of infection (e.g., redness, warmth, fever).
• Worsening pain or lack of improvement after initial treatment.

Tips for Medical Coders

This code is used for a subsequent encounter (K) of a displaced transverse fracture of the left fibula shaft that is closed and has developed nonunion. Document the fracture's status (closed, nonunion) and the encounter type (subsequent) clearly. Ensure the left fibula and transverse fracture pattern are specified, as these are key components of the code. Nonunion should be confirmed via imaging or clinical assessment.