S82.426R Nondisplaced transverse fracture of shaft of unspecified fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion

Name of the Condition

• Nondisplaced transverse fracture of shaft of unspecified fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
• ICD-10 Code: S82.426R

Summary

A nondisplaced transverse fracture of the shaft of the unspecified 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, but the fracture is classified as open (type IIIA, IIIB, or IIIC) with malunion, meaning the bone has healed in an abnormal position. This is a subsequent encounter for treatment of the fracture.

Causes

Most commonly caused by direct trauma or high-impact forces to the leg, such as falls, sports injuries, or motor vehicle accidents. Open fractures may result from the same mechanisms, with the force sufficient to break the skin and expose the fracture site. Malunion can occur if the fracture heals improperly, often due to inadequate immobilization or delayed treatment.

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.
• Delayed or inadequate initial fracture management.

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.
• Visible signs of malunion, such as abnormal bone alignment.

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, evaluate malunion, and determine the extent of soft tissue damage. Additional imaging, such as CT scans, may be used to assess complex fractures or malunion.

Treatment Options

Treatment focuses on realigning the bone (if necessary) and promoting proper healing. Options may include:

• Surgical intervention to correct malunion, such as osteotomy or bone grafting.
• Immobilization with a cast or brace to stabilize the fracture.
• Physical therapy to restore strength and mobility.
• Pain management and wound care for open fractures.

Prognosis and Follow-Up

Prognosis depends on the severity of malunion and the success of treatment. Most patients can expect improved function with proper management, but some may experience long-term stiffness or weakness. Follow-up care is essential to monitor healing and adjust treatment as needed.

Complications

• Chronic pain or instability.
• Nerve or blood vessel damage.
• Infection (especially with open fractures).
• Delayed union or nonunion of the fracture.
• Long-term mobility issues.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use protective gear during sports or activities.
• Maintain bone health through diet and exercise.
• Follow post-treatment instructions carefully to prevent re-injury.

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Severe pain or swelling that worsens.
• Inability to bear weight on the leg.
• Signs of infection, such as fever or pus.
• New or worsening deformity.

Tips for Medical Coders

Document the fracture type (IIIA, IIIB, or IIIC) and the presence of malunion clearly. Ensure the encounter is coded as "subsequent" to reflect ongoing treatment. Include details about the fracture's alignment and any surgical or therapeutic interventions performed.