S82.425K Nondisplaced transverse fracture of shaft of left fibula, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Nondisplaced transverse fracture of shaft of left fibula, subsequent encounter for closed fracture with nonunion
• ICD-10 Code: S82.425K

Summary

A nondisplaced 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 fracture line runs horizontally across the middle portion of the bone. The bone fragments remain in their normal anatomical alignment, and the fracture is classified as closed (no break in the skin). This code is used for a subsequent encounter when the fracture has failed to heal (nonunion) after an initial treatment period.

Causes

Most commonly caused by direct trauma or impact to the leg, such as from falls, sports injuries, or motor vehicle accidents. High-force impacts or twisting motions can also lead to this type of fracture. Nonunion may occur due to inadequate immobilization, poor blood supply to the bone, infection, or other factors that impede 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.
• Difficulty bearing weight on the affected leg.
• Bruising or tenderness around the injured area.
• Possible deformity or instability of the leg structure.
• Lack of improvement in symptoms over time, indicating nonunion.

Diagnosis

Diagnosis involves a physical examination by a healthcare professional to assess tenderness, swelling, and deformity. Imaging tests, such as X-rays, are typically used to confirm the fracture and determine its extent and alignment. Additional imaging, like CT scans or MRI, may be used to evaluate nonunion and assess bone healing.

Treatment Options

Treatment may include immobilization with a cast or brace to stabilize the fracture. Surgical intervention, such as bone grafting or internal fixation, may be necessary to promote healing in cases of nonunion. Physical therapy is often recommended to restore strength and mobility once the fracture has healed.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the effectiveness of treatment. Regular follow-up appointments are necessary to monitor healing progress. Full recovery may take several months, and some patients may experience long-term limitations in mobility or function.

Complications

• Chronic pain or discomfort.
• Delayed or failed healing (nonunion).
• Infection, particularly if surgical intervention is required.
• Nerve or blood vessel damage.
• Long-term mobility issues or arthritis.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.
• Use protective equipment during sports or activities with a risk of injury.
• Quit smoking, as it can impair bone healing.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or deformity after an injury. Contact your healthcare provider if symptoms worsen or do not improve over time, as this may indicate nonunion or other complications.

Tips for Medical Coders

This code is specific to a subsequent encounter for a closed fracture with nonunion of the left fibula. Ensure documentation supports the nonunion status and that the encounter is classified as subsequent (not initial or acute). Verify the fracture type (closed) and anatomical location (left fibula) are clearly documented.