S82.423M Displaced transverse fracture of shaft of unspecified fibula, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

• Displaced transverse fracture of shaft of unspecified fibula, subsequent encounter for open fracture type I or II with nonunion
• ICD-10 Code: S82.423M

Summary

A displaced 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 bone fragments are separated and misaligned. The fracture line runs horizontally across the middle portion of the bone, and the displacement indicates the fragments are not in their normal anatomical position. This code represents a subsequent encounter for an open fracture classified as type I or II, meaning the overlying skin is breached but the wound is typically small and clean, with nonunion indicating the fracture has failed to heal properly.

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 occur when the bone pierces the skin or when external force damages the skin over the fracture site. Nonunion may result from inadequate immobilization, poor blood supply, 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.
• Conditions that impair wound healing or increase infection risk.
• Smoking or poor nutrition, which can affect 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.
• Visible deformity or instability of the leg structure.
• Possible signs of nonunion, such as lack of healing progress over time.

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 used to confirm the fracture type, displacement, and nonunion status. The open fracture classification (type I or II) is determined by the size and cleanliness of the skin wound. Additional tests may be performed to evaluate bone healing and rule out infection.

Treatment Options

Treatment focuses on promoting fracture healing and addressing nonunion. Options may include surgical intervention, such as internal fixation with plates or screws, to stabilize the bone. Open fractures require wound care to prevent infection, and nonunion may necessitate bone grafting or other procedures to stimulate healing. Physical therapy is often recommended to restore strength and mobility once the fracture is stable.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, the success of treatment, and the patient’s overall health. Nonunion may require extended treatment and monitoring. Regular follow-up appointments are necessary to assess healing progress, adjust treatment plans, and address any complications. Most patients can expect gradual improvement, but full recovery may take several months.

Complications

• Infection at the fracture site or wound.
• Delayed or failed healing (nonunion).
• Nerve or blood vessel damage.
• Chronic pain or instability.
• Post-traumatic arthritis in the ankle or knee.

Lifestyle & Prevention

• Avoid high-impact activities 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 gear during sports or activities with fall risks.
• Maintain a healthy weight to reduce stress on bones.

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 you notice signs of infection (e.g., redness, pus, fever) or if pain persists despite treatment. Follow up as scheduled to monitor healing and address concerns about nonunion.

Tips for Medical Coders

This code is used for a subsequent encounter for an open fracture type I or II of the fibula shaft with nonunion. Document the fracture type, encounter stage, and nonunion status clearly. Ensure the open fracture classification (type I or II) is supported by clinical findings, and note any surgical interventions or treatments related to nonunion. Verify that the encounter is subsequent (not initial) and that the fracture is of the fibula shaft, not another bone.