S82.851 Displaced trimalleolar fracture of right lower leg

Name of the Condition

• Displaced trimalleolar fracture of right lower leg
• ICD-10 Code: S82.851

Summary

This condition involves a displaced fracture of the right lower leg affecting all three malleoli (medial, lateral, and posterior) of the ankle joint. The fracture typically results in bone displacement, which may require surgical intervention to restore alignment. The injury disrupts the stability of the ankle and can impact weight-bearing ability.

Causes

Trimalleolar fractures usually result from high-impact trauma, such as falls from a height, motor vehicle accidents, or severe twisting injuries to the ankle. The force applied to the ankle joint can cause simultaneous fractures of the medial malleolus (tibia), lateral malleolus (fibula), and posterior malleolus (tibia), leading to displacement.

Risk Factors

• Participation in activities with high fall risk, such as contact sports or skiing.
• Advanced age, which may reduce bone density and increase fracture susceptibility.
• Osteoporosis or other bone-weakening conditions.
• Previous ankle injuries or ligamentous instability.

Symptoms

• Severe pain, swelling, and bruising around the ankle.
• Inability to bear weight on the affected leg.
• Visible deformity or misalignment of the ankle joint.
• Tenderness and instability during movement.

Diagnosis

Diagnosis begins with a physical examination to assess pain, swelling, and deformity. Imaging, typically X-rays, confirms the fracture and evaluates displacement. CT scans may be used for detailed visualization of complex fractures or to assess joint alignment. MRI is occasionally employed to evaluate associated soft tissue damage.

Treatment Options

Treatment depends on fracture severity and displacement. Non-displaced fractures may be managed with immobilization (e.g., casting or bracing) and restricted weight-bearing. Displaced fractures often require surgical intervention, such as open reduction and internal fixation (ORIF), to realign and stabilize the bones. Postoperative care includes physical therapy to restore function.

Prognosis and Follow-Up

Prognosis is generally favorable with appropriate treatment, though recovery may take several months. Follow-up appointments monitor healing, alignment, and functional recovery. Physical therapy is often recommended to improve strength and mobility. Long-term outcomes depend on fracture complexity and adherence to rehabilitation.

Complications

• Post-traumatic arthritis due to joint damage.
• Nerve or blood vessel injury during the fracture or surgery.
• Infection, particularly with surgical intervention.
• Chronic pain or stiffness in the ankle.

Lifestyle & Prevention

• Wear appropriate footwear and protective gear during high-risk activities.
• Maintain bone health through calcium and vitamin D intake.
• Avoid uneven surfaces or hazardous environments that increase fall risk.
• Engage in exercises to improve balance and ankle stability.

When to Seek Professional Help

Seek immediate medical attention if you experience severe ankle pain, swelling, or deformity after an injury. Prompt evaluation is critical to assess for fracture and prevent complications. Delayed treatment may worsen displacement or joint damage.

Tips for Medical Coders

Document the laterality (right) and displacement status clearly, as these are key components of the code. Ensure clinical notes specify the involvement of all three malleoli to support the diagnosis. Verify that imaging or surgical reports confirm displacement, as this differentiates the code from non-displaced trimalleolar fractures.