S82.491K Other fracture of shaft of right fibula, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Other fracture of shaft of right fibula, subsequent encounter for closed fracture with nonunion
• ICD-10 Code: S82.491K

Summary

This condition describes a fracture of the shaft (middle portion) of the right fibula, the smaller bone in the lower leg, during a subsequent encounter. The fracture is closed (skin remains intact) and has developed nonunion, meaning the bone has failed to heal properly after an expected time. The term "other" indicates a specific fracture type not classified under more detailed subcategories.

Causes

Most commonly caused by prior trauma to the right leg, such as falls, sports injuries, or motor vehicle accidents. Nonunion may result from inadequate immobilization, poor blood supply to the bone, infection, or excessive movement during healing.

Risk Factors

• Participation in high-impact activities or contact sports.
• Osteoporosis or reduced bone density, which impairs healing.
• Smoking or poor nutrition, which affects bone repair.
• Previous leg injuries or surgeries that disrupt blood flow.
• Certain medical conditions (e.g., diabetes) that slow healing.

Symptoms

• Persistent pain and swelling in the lower right leg.
• Difficulty bearing weight on the affected leg.
• Bruising or tenderness around the injured area.
• Possible instability or deformity of the leg structure.
• No visible improvement in symptoms over time.

Diagnosis

Diagnosis involves a physical examination to assess tenderness, swelling, and deformity. Imaging tests, such as X-rays or CT scans, are used to confirm nonunion by showing a persistent fracture line with no bridging bone. Additional tests may evaluate blood flow or infection.

Treatment Options

Treatment depends on the severity of nonunion and may include:

• Surgical intervention (e.g., bone grafting, internal fixation) to stimulate healing.
• External fixation devices to stabilize the fracture.
• Physical therapy to restore strength and mobility.
• Pain management and activity modification.

Prognosis and Follow-Up

Prognosis varies based on the cause of nonunion and treatment response. Follow-up imaging and clinical assessments are typically required to monitor healing progress. Long-term outcomes may include persistent pain or functional limitations if healing is incomplete.

Complications

• Chronic pain or instability in the leg.
• Increased risk of future fractures.
• Nerve or blood vessel damage near the fracture site.
• Infection (if surgical intervention is needed).
• Reduced mobility or gait abnormalities.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Maintain a balanced diet rich in calcium and vitamin D to support bone health.
• Quit smoking, as it impairs bone healing.
• Use protective gear during sports or activities with fall risks.
• Follow post-treatment instructions carefully to promote healing.

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Sudden, severe pain or swelling in the leg.
• Inability to bear weight on the affected leg.
• Visible deformity or instability.
• Signs of infection (e.g., redness, warmth, fever).

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with nonunion. Ensure clinical notes specify the fracture type, nonunion status, and that the encounter is for follow-up care. Code S82.491K is appropriate when the fracture is closed, nonunion is present, and this is not the initial treatment phase.