S82.491R Other fracture of shaft of right fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion

Name of the Condition

• Other fracture of shaft of right fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
• ICD-10 Code: S82.491R

Summary

This condition describes a fracture of the shaft (middle portion) of the right fibula, the smaller bone in the lower leg. It is a subsequent encounter for an open fracture classified as type IIIA, IIIB, or IIIC, indicating significant soft tissue damage and contamination. The term "malunion" signifies that the bone has healed in a misaligned position. This code applies when the patient is being seen for follow-up care after the initial injury and treatment.

Causes

Most commonly caused by high-force trauma to the right leg, such as motor vehicle accidents, falls from height, or severe sports injuries. Open fractures with malunion may result from inadequate initial treatment, infection, or poor healing conditions.

Risk Factors

• High-impact activities or occupations with a risk of leg injury.
• Delayed or incomplete initial fracture management.
• Poor nutritional status or underlying conditions affecting bone healing.
• History of smoking or poor circulation, which impairs tissue repair.

Symptoms

• Persistent pain, swelling, or tenderness at the fracture site.
• Visible deformity or misalignment of the lower leg.
• Limited range of motion or instability in the ankle or knee.
• Possible signs of infection, such as redness, warmth, or drainage.
• Difficulty bearing weight on the affected leg.

Diagnosis

Diagnosis involves a physical examination to assess alignment, stability, and soft tissue integrity. Imaging, such as X-rays or CT scans, confirms the malunion and evaluates bone healing. Clinical assessment of the open fracture site (e.g., wound size, contamination) determines the type (IIIA, IIIB, or IIIC).

Treatment Options

Treatment focuses on correcting the malunion and addressing complications. Options may include surgical realignment (osteotomy), bone grafting, or hardware revision. Wound care and infection management are critical for open fractures. Physical therapy is often recommended to restore function and strength.

Prognosis and Follow-Up

Prognosis depends on the severity of the malunion, soft tissue damage, and response to treatment. Follow-up care is essential to monitor healing, alignment, and functional recovery. Long-term outcomes may include residual pain, stiffness, or altered gait, requiring ongoing rehabilitation.

Complications

• Chronic pain or instability due to malalignment.
• Nonunion (failure of the bone to heal) or delayed union.
• Infection, particularly with open fractures.
• Nerve or vascular damage affecting leg function.
• Post-traumatic arthritis in the ankle or knee.

Lifestyle & Prevention

• Avoid high-risk activities until cleared by a healthcare provider.
• Use protective equipment during sports or work to prevent reinjury.
• Follow prescribed rehabilitation to optimize healing and function.
• Maintain a healthy diet and avoid smoking to support bone repair.

When to Seek Professional Help

Seek immediate care if you experience severe pain, swelling, or deformity after an injury. Contact a healthcare provider if you notice signs of infection (e.g., fever, redness, drainage) or if symptoms worsen during recovery.

Tips for Medical Coders

This code requires documentation of the subsequent encounter, open fracture type (IIIA, IIIB, or IIIC), and malunion. Ensure the record specifies the fracture's location (shaft of right fibula), the encounter type (subsequent), and the presence of malunion. Clinical details about the open fracture (e.g., wound size, contamination) and healing status are critical for accurate coding.