S82.6 Fracture of lateral malleolus

Name of the Condition

• Fracture of lateral malleolus

Summary

A fracture of the lateral malleolus is a break in the outer bony prominence of the ankle, part of the fibula. This injury often results from trauma and may involve displacement of the bone fragment. The severity and treatment depend on the fracture's alignment and stability.

Causes

Direct trauma to the ankle, such as a fall or impact. Twisting or rolling of the ankle during activities. High-impact injuries, including sports or accidents.

Risk Factors

• Participation in activities with high ankle stress (e.g., running, jumping).
• Osteoporosis or weakened bone density.
• Previous ankle injuries that may compromise stability.
• Age-related bone fragility.

Symptoms

• Pain localized to the outer ankle.
• Swelling and bruising around the fracture site.
• Difficulty bearing weight or walking.
• Possible deformity if the bone is displaced.

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and range of motion. Imaging tests, such as X-rays, are used to confirm the fracture and evaluate its alignment. Additional scans (e.g., CT or MRI) may be ordered for detailed assessment.

Treatment Options

• Immobilization with a cast or splint to stabilize the fracture.
• Pain management through medications or ice therapy.
• Surgical intervention for displaced or unstable fractures, involving realignment and fixation.
• Physical therapy to restore strength and mobility during recovery.

Prognosis and Follow-Up

With proper treatment, most fractures heal within 6–8 weeks. Follow-up appointments monitor healing progress, and imaging may be repeated to assess bone union. Return to normal activities depends on fracture severity and adherence to rehabilitation.

Complications

• Nonunion or delayed healing of the fracture.
• Arthritis in the ankle joint due to misalignment.
• Nerve or vascular damage in severe cases.
• Chronic pain or instability if untreated.

Lifestyle & Prevention

• Wear supportive footwear during high-risk activities.
• Strengthen ankle muscles through targeted exercises.
• Avoid uneven surfaces that increase fall risk.
• Maintain bone health with adequate calcium and vitamin D intake.

When to Seek Professional Help

Seek immediate care for severe pain, inability to bear weight, visible deformity, or signs of infection (e.g., redness, fever). Persistent swelling or pain after initial treatment also warrants evaluation.

Tips for Medical Coders

Document the fracture's laterality (left/right), displacement status, and encounter type (initial, subsequent, or sequela) to ensure accurate coding. Include details on open vs. closed fractures and any associated injuries for comprehensive coding.