S82.426Q Nondisplaced transverse fracture of shaft of unspecified fibula, subsequent encounter for open fracture type I or II with malunion

Name of the Condition

• Nondisplaced transverse fracture of shaft of unspecified fibula, subsequent encounter for open fracture type I or II with malunion
• ICD-10 Code: S82.426Q

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, and the fracture is classified as open type I or II (skin is broken but the wound is typically small and clean, with minimal soft tissue damage). This is a subsequent encounter, indicating follow-up care after the initial injury, and the fracture has healed with malunion (abnormal alignment of the bone fragments).

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 may result from the same mechanisms, with the force sufficient to break the skin and expose 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.

Symptoms

• 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 due to malunion.

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 the injury. The classification of the fracture as open type I or II and the presence of malunion are documented based on clinical findings and imaging results.

Treatment Options

Treatment may include immobilization with a cast or brace to stabilize the fracture and allow healing. Physical therapy may be recommended to restore strength and mobility. In cases of significant malunion, surgical intervention may be considered to realign the bone fragments. Wound care is essential for open fractures to prevent infection.

Prognosis and Follow-Up

The prognosis depends on the severity of the malunion and the effectiveness of treatment. Most patients recover with proper care, but malunion may lead to long-term functional limitations or discomfort. Follow-up appointments are necessary to monitor healing and adjust treatment as needed.

Complications

• Infection, particularly with open fractures.
• Delayed healing or nonunion.
• Chronic pain or instability due to malunion.
• Nerve or vascular damage in severe cases.

Lifestyle & Prevention

• Avoid high-impact activities that increase fracture risk.
• Maintain bone health through a balanced diet and regular exercise.
• Use protective gear during sports or activities with fall risks.
• Seek prompt medical attention for leg injuries to prevent complications.

When to Seek Professional Help

Seek immediate medical care if you experience severe pain, swelling, or inability to bear weight on the leg, or if the skin over the fracture site is broken. Follow up with a healthcare provider if symptoms worsen or do not improve with initial treatment.

Tips for Medical Coders

Document the fracture type (open I or II), the presence of malunion, and the subsequent encounter status clearly in the medical record. Ensure the fibula is documented as unspecified (not right or left) and that the fracture is confirmed as nondisplaced and transverse. Code S82.426Q is appropriate for follow-up care of this specific fracture type with malunion.