S82.423C Displaced transverse fracture of shaft of unspecified fibula, initial encounter for open fracture type IIIA, IIIB, or IIIC

Name of the Condition

• Displaced transverse fracture of shaft of unspecified fibula, initial encounter for open fracture type IIIA, IIIB, or IIIC
• ICD-10 Code: S82.423C

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 injury is classified as an open fracture (type IIIA, IIIB, or IIIC), meaning the skin is broken, and soft tissue damage is present. The initial encounter denotes the first time the patient is seen for this specific injury.

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 severe trauma where the bone pierces the skin or from external forces that damage the surrounding soft tissue.

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.
• High-energy trauma, such as motor vehicle collisions.

Symptoms

• 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.
• Open wound or laceration at the fracture site (indicating an open fracture).
• Possible exposure of bone or soft tissue through the wound.

Diagnosis

Diagnosis involves a physical examination by a healthcare professional to assess tenderness, swelling, deformity, and the presence of an open wound. Imaging tests, such as X-rays, are typically used to confirm the fracture, determine its extent, and evaluate displacement. Additional imaging, like CT scans, may be used to assess soft tissue damage. The classification of the open fracture (IIIA, IIIB, or IIIC) is based on the severity of soft tissue injury, contamination, and vascular involvement.

Treatment Options

Treatment focuses on stabilizing the fracture, managing the open wound, and preventing infection. This may include:

• Surgical intervention to realign and fix the bone fragments (internal or external fixation).
• Wound debridement to remove damaged tissue and reduce infection risk.
• Antibiotics to treat or prevent infection.
• Immobilization with a cast or brace to support healing.
• Pain management and physical therapy to restore function.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, the extent of soft tissue damage, and the patient’s overall health. Open fractures carry a higher risk of infection and complications, which may prolong recovery. Follow-up care includes monitoring for signs of infection, assessing fracture healing, and guiding rehabilitation. Physical therapy is often necessary to restore strength and mobility.

Complications

• Infection at the fracture site or wound.
• Delayed healing or nonunion of the fracture.
• Nerve or vascular damage.
• Chronic pain or instability.
• Post-traumatic arthritis.
• Compartment syndrome (increased pressure in the leg).

Lifestyle & Prevention

• Wear appropriate protective gear during high-risk activities (e.g., sports, construction).
• Maintain bone health through a balanced diet rich in calcium and vitamin D.
• Avoid activities that increase the risk of falls or trauma.
• Strengthen leg muscles to improve stability and reduce injury risk.

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Severe pain, swelling, or deformity in the leg.
• An open wound or bleeding at the injury site.
• Inability to bear weight or move the leg.
• Signs of infection, such as fever, redness, or pus.
• Numbness, tingling, or loss of circulation in the foot or toes.

Tips for Medical Coders

When coding S82.423C, ensure documentation specifies:

• The fracture is displaced and transverse, involving the shaft of the fibula (unspecified side).
• The encounter is initial (not subsequent or sequela).
• The open fracture type is clearly documented as IIIA, IIIB, or IIIC, with details on soft tissue damage, contamination, or vascular involvement. Accurate documentation of the fracture type and encounter stage is critical for correct coding.