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

Name of the Condition

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

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 was breached but the wound is typically small and clean, with malunion indicating the fracture has healed in a non-anatomical position.

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, and malunion may result from inadequate initial treatment, poor blood supply, or excessive movement during 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.
• 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.
• Visible deformity or instability of the leg structure.
• Possible limited range of motion in the ankle or knee.
• Signs of malunion, such as abnormal bone alignment or limb length discrepancy.

Diagnosis

Diagnosis involves a physical examination by a healthcare professional to assess tenderness, swelling, deformity, and malunion. Imaging tests, such as X-rays or CT scans, are used to confirm the fracture type, displacement, and malunion. The history of the initial injury and subsequent healing is critical to determine the fracture's classification and encounter type.

Treatment Options

Treatment may include immobilization with a cast or brace to stabilize the fracture, physical therapy to restore function and strength, and possible surgical intervention to correct malunion or realign the bone. Pain management and monitoring for infection are also important, especially given the open fracture history.

Prognosis and Follow-Up

Prognosis depends on the severity of malunion, patient age, and overall health. Follow-up care is essential to monitor healing, assess functional recovery, and address any complications. Long-term outcomes may include residual pain, stiffness, or altered gait, which may require ongoing management.

Complications

• Chronic pain or discomfort.
• Limited mobility or joint stiffness.
• Increased risk of future fractures.
• Nerve or vascular damage.
• Infection, particularly if the initial open fracture was not properly managed.
• Need for additional surgery to correct malunion.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use protective gear during sports or activities with fall risks.
• Maintain bone health through adequate nutrition and exercise.
• Follow post-treatment guidelines to support proper healing.
• Attend all follow-up appointments to monitor progress.

When to Seek Professional Help

Seek immediate medical attention if experiencing severe pain, swelling, or deformity, or if there are signs of infection (e.g., redness, warmth, or pus). Follow up with a healthcare provider if symptoms worsen or do not improve with treatment.

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 malunion. Documentation should specify the fracture type, encounter stage, and presence of malunion. Ensure the open fracture classification (type I or II) and malunion are clearly documented to support code assignment.