S82.865D Nondisplaced Maisonneuve's fracture of left leg, subsequent encounter for closed fracture with routine healing

Name of the Condition

• Nondisplaced Maisonneuve's fracture of left leg, subsequent encounter for closed fracture with routine healing

Summary

A Maisonneuve's fracture is a specific type of ankle injury involving a fracture of the proximal fibula (upper portion of the smaller lower leg bone) combined with a tear of the syndesmotic ligaments and often an associated injury to the medial malleolus or deltoid ligament. The term "nondisplaced" indicates that the fractured bone fragments remain aligned. This injury typically results from rotational forces applied to the ankle, commonly seen in trauma such as falls or sports injuries. The "subsequent encounter for closed fracture with routine healing" specifies this is a follow-up visit for a fracture that has healed without complications and without an open wound.

Causes

The fracture is caused by external rotational forces applied to the ankle, often during activities that involve twisting or turning. Common scenarios include falls, motor vehicle accidents, or sports-related impacts where the foot is planted and the body rotates forcefully. The mechanism typically involves the talus rotating outward, stressing the syndesmotic ligaments and causing the proximal fibula to fracture.

Risk Factors

• Participation in activities with high rotational stress on the ankle, such as soccer or basketball.
• Previous ankle injuries or ligamentous instability.
• Improper footwear or uneven terrain increasing fall risk.
• Age-related factors that may affect bone density or ligament integrity.

Symptoms

• Pain and swelling localized to the proximal fibula and ankle.
• Difficulty bearing weight on the affected leg.
• Instability or a feeling of the ankle "giving way."
• Bruising or tenderness along the lower leg.

Diagnosis

Diagnosis involves a physical examination to assess ankle stability, tenderness, and swelling. Imaging, typically X-rays, is used to identify the proximal fibula fracture and associated injuries. Additional imaging, such as CT or MRI, may be used to evaluate ligament damage or other associated injuries. The "subsequent encounter" context confirms the fracture is healing as expected, with no signs of nonunion or malunion.

Treatment Options

Treatment for a nondisplaced Maisonneuve's fracture typically involves immobilization with a cast or brace to allow healing. Physical therapy may be recommended to restore strength and mobility once the fracture has healed. Surgical intervention is rarely needed for nondisplaced fractures but may be considered if instability persists. Follow-up care focuses on monitoring healing progress and addressing any residual symptoms.

Prognosis and Follow-Up

With proper treatment, most nondisplaced Maisonneuve's fractures heal without long-term complications. Routine healing is expected, and patients often regain full function of the ankle. Follow-up appointments are important to ensure the fracture is healing correctly and to adjust treatment as needed. Return to normal activities is typically gradual, guided by pain levels and functional recovery.

Complications

While routine healing is expected, potential complications include delayed union, nonunion, or malunion of the fracture. Persistent ankle instability or chronic pain may occur if ligamentous injuries are not fully addressed. In rare cases, post-traumatic arthritis may develop over time.

Lifestyle & Prevention

• Wear appropriate footwear for activities to reduce rotational stress on the ankle.
• Use caution on uneven surfaces to avoid falls.
• Engage in exercises to strengthen ankle muscles and improve stability.
• Consider bracing or taping for high-risk activities if previous ankle injuries exist.

When to Seek Professional Help

Seek medical attention if you experience severe pain, inability to bear weight, or worsening swelling after an injury. Follow-up with a healthcare provider if you notice persistent instability, pain, or difficulty moving the ankle during the healing process.

Tips for Medical Coders

This code represents a subsequent encounter for a closed, nondisplaced Maisonneuve's fracture of the left leg with routine healing. Document the encounter type (subsequent), fracture status (closed, nondisplaced), and healing progress (routine) to support accurate coding. Ensure clinical documentation aligns with the specified laterality (left leg) and confirms the fracture is healing without complications.