S82.842 Displaced bimalleolar fracture of left lower leg

Name of the Condition

• Displaced bimalleolar fracture of left lower leg
• ICD-10 Code: S82.842

Summary

A displaced bimalleolar fracture of the left lower leg involves a break in both the medial (inner) and lateral (outer) malleoli, the bony prominences at the distal end of the tibia and fibula. The fracture is displaced, meaning bone fragments are shifted out of their normal alignment. This injury typically affects the ankle joint and may result in instability due to the involvement of both bones. It often occurs from trauma that disrupts the structural integrity of the ankle.

Causes

Displaced bimalleolar fractures commonly result from high-impact trauma, such as falls, motor vehicle accidents, or sports-related injuries. Direct force to the ankle, particularly when the foot is in a fixed position, can cause both malleoli to fracture and shift out of alignment. Twisting or rotational forces may also contribute to this type of injury.

Risk Factors

• Participation in activities with a high risk of ankle trauma, such as contact sports or skiing.
• Advanced age, which may lead to decreased bone density and increased fracture susceptibility.
• Conditions that weaken bone structure, such as osteoporosis or metabolic disorders.
• Previous ankle injuries or surgeries that compromise joint stability.

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 when attempting movement.

Diagnosis

Diagnosis begins with a physical examination to assess pain, swelling, and deformity. Imaging, such as X-rays, confirms the fracture and displacement. CT or MRI may be used for detailed visualization of complex injuries or associated soft tissue damage.

Treatment Options

Treatment depends on the severity of displacement and joint stability. Non-surgical options include immobilization with a cast or brace and pain management. Surgical intervention may be necessary to realign and stabilize the bones using plates, screws, or pins. Physical therapy is often recommended during recovery to restore function and strength.

Prognosis and Follow-Up

Prognosis varies based on the extent of injury and treatment. Most patients recover with proper management, though full function may take several months. Follow-up appointments monitor healing, alignment, and mobility. Complications like arthritis or chronic instability may require long-term care.

Complications

• Post-traumatic arthritis due to joint damage.
• Chronic ankle instability or reduced range of motion.
• Nerve or blood vessel injury in severe cases.
• Infection or delayed healing after surgery.

Lifestyle & Prevention

• Wear supportive footwear and use ankle braces during high-risk activities.
• Maintain bone health through adequate calcium and vitamin D intake.
• Improve balance and strength with exercises to reduce fall risk.
• Avoid uneven surfaces or hazardous environments that increase injury likelihood.

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. Contact a healthcare provider if symptoms worsen or do not improve with initial care.

Tips for Medical Coders

Document the specific side (left) and displacement status clearly. Include details on fracture type (e.g., open/closed) and encounter stage (e.g., initial, subsequent) if applicable. Ensure alignment with clinical notes to support accurate coding.