S82.422N Displaced transverse fracture of shaft of left fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion

Name of the Condition

• Displaced transverse fracture of shaft of left fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion
• ICD-10 Code: S82.422N

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 is a subsequent encounter for an open fracture (type IIIA, IIIB, or IIIC) with nonunion, meaning the fracture has failed to heal properly after an initial injury, and the skin was breached during the injury. The nonunion indicates the bone fragments have not fused together as expected.

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. Open fractures (types IIIA, IIIB, or IIIC) occur when the trauma is severe enough to breach the skin, increasing the risk of infection and complicating healing. Nonunion may result from inadequate initial treatment, poor blood supply to the bone, or excessive movement at the fracture site.

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.
• Open fractures (types IIIA, IIIB, or IIIC) due to higher infection risk and tissue damage.
• Factors that impair healing, such as smoking, diabetes, or poor nutrition.

Symptoms

• Persistent pain and swelling in the lower leg, often long after the initial injury.
• Difficulty bearing weight on the affected leg.
• Bruising or tenderness around the injured area.
• Visible deformity or instability of the leg structure.
• Possible open wound at the fracture site (for open fractures).
• Signs of nonunion, such as lack of healing progress on imaging or persistent pain.

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. Additional tests, like MRI or bone scans, may be used to evaluate blood supply and healing potential. Documentation of the open fracture type (IIIA, IIIB, or IIIC) and the nonunion status is critical for accurate coding.

Treatment Options

Treatment focuses on promoting bone healing and addressing the open fracture. Options may include surgical intervention, such as internal fixation with plates or screws, bone grafting to stimulate healing, or external fixation devices. Antibiotics are often required for open fractures to prevent infection. Physical therapy may be recommended to restore function and strength once healing progresses. In some cases, additional surgeries or long-term management may be necessary for nonunion.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, the type of open fracture, and the success of treatment. Nonunion fractures may require extended healing time or additional interventions. Regular follow-up with imaging is necessary to monitor progress. Complications like infection or chronic pain can affect recovery. Long-term outcomes may include residual stiffness or weakness, but many patients regain functional use of the leg with appropriate treatment.

Complications

• Infection, particularly with open fractures (types IIIA, IIIB, or IIIC).
• Chronic pain or discomfort.
• Nonunion or delayed healing.
• Nerve or vascular damage.
• Arthritis or joint stiffness in the affected leg.
• Leg length discrepancy or deformity.

Lifestyle & Prevention

• Avoid high-impact activities or contact sports until cleared by a healthcare provider.
• Follow a balanced diet rich in calcium and vitamin D to support bone health.
• Quit smoking, as it impairs bone healing.
• Use protective equipment during activities to reduce injury risk.
• Maintain a healthy weight to minimize stress on the leg.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or deformity in the leg, especially if there is an open wound. Contact a healthcare provider if pain persists, worsens, or if you notice signs of infection (e.g., redness, pus, fever). Follow up with your provider if you have concerns about healing progress or if symptoms do not improve with treatment.

Tips for Medical Coders

Document the fracture type (displaced transverse), location (shaft of left fibula), encounter type (subsequent), open fracture classification (IIIA, IIIB, or IIIC), and nonunion status clearly. Ensure the open fracture type is specified, as this impacts coding and reimbursement. Verify that the nonunion is documented as a complication of the initial fracture to support the code. Use additional codes for any associated infections or treatments as needed.