S93.412 Sprain of calcaneofibular ligament of left ankle

Name of the Condition

• Common Name: Left ankle sprain
• Medical Term: Sprain of calcaneofibular ligament of left ankle

Summary

A sprain of the calcaneofibular ligament of the left ankle is an injury where the ligament connecting the calcaneus (heel bone) to the fibula (lower leg bone) is stretched, torn, or damaged. This typically results from a sudden twist or roll of the foot, leading to pain and instability in the left ankle.

Causes

This injury often occurs due to activities that involve sudden changes in direction, such as sports, or from stepping on uneven surfaces that cause the ankle to turn awkwardly. Direct trauma to the outer ankle may also contribute.

Risk Factors

• Participation in sports requiring running, jumping, or sharp movements (e.g., basketball, soccer)
• Walking or running on uneven terrain or slippery surfaces
• Previous ankle injuries, which can weaken ligament integrity
• Wearing footwear that lacks proper support or stability

Symptoms

• Pain or tenderness along the outer side of the left ankle
• Swelling and bruising around the lateral left ankle
• Limited range of motion in the left ankle joint
• Instability or a feeling of the ankle "giving way"
• Difficulty bearing weight on the affected foot

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, range of motion, and stability of the left ankle. Imaging tests such as X-rays may be used to rule out fractures, and MRI may be ordered to evaluate ligament damage.

Treatment Options

Treatment typically includes rest, ice, compression, and elevation (RICE) to reduce swelling and pain. Nonsteroidal anti-inflammatory drugs (NSAIDs) may help manage discomfort. Physical therapy can improve strength and stability, and bracing or taping may support the ankle during recovery. Severe cases may require immobilization or surgical intervention.

Prognosis and Follow-Up

Most mild to moderate sprains heal within 2–6 weeks with proper care. Severe sprains may take longer, and full recovery depends on adherence to treatment and rehabilitation. Follow-up appointments monitor healing progress and adjust therapy as needed.

Complications

Potential complications include chronic ankle instability, recurrent sprains, or long-term pain. Incomplete healing may increase the risk of future injuries.

Lifestyle & Prevention

Wearing supportive footwear, using ankle braces during high-risk activities, and performing balance exercises can reduce injury risk. Avoiding uneven surfaces and warming up before exercise may also help prevent sprains.

When to Seek Professional Help

Seek medical attention if pain is severe, swelling worsens, or weight-bearing is impossible. Persistent instability or inability to move the ankle warrants evaluation to rule out fractures or severe ligament damage.

Tips for Medical Coders

Use this code for a documented sprain of the calcaneofibular ligament specifically affecting the left ankle. Ensure clinical documentation specifies the ligament and side (left) to support accurate coding. Verify no other injuries (e.g., fractures) are present that would require additional codes.