S82.866D Nondisplaced Maisonneuve's fracture of unspecified leg, subsequent encounter for closed fracture with routine healing

Name of the Condition

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

Summary

A Maisonneuve's fracture is a specific type of ankle injury involving a proximal fibula fracture combined with a tear of the tibiofibular syndesmosis and often an associated medial malleolus or deltoid ligament injury. The term "nondisplaced" indicates that the fractured bone fragments remain in their normal alignment. This injury typically results from rotational forces applied to the ankle, leading to instability in the ankle joint. The "closed fracture" designation means the skin is intact, and "subsequent encounter" refers to follow-up care after the initial treatment phase. "Routine healing" indicates the fracture is progressing normally without complications.

Causes

The fracture is usually caused by external rotation of the foot, which can occur during activities like twisting the ankle, falls, or sports-related injuries. The rotational force disrupts the syndesmotic ligaments and may cause additional damage to the medial structures of the ankle.

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 confirm healing progress during follow-up visits.

Treatment Options

Treatment focuses on stabilizing the ankle and promoting healing. This may include immobilization with a cast or brace, pain management, and physical therapy to restore strength and mobility. Surgical intervention is rarely needed for nondisplaced fractures but may be considered if instability persists.

Prognosis and Follow-Up

With proper treatment, most nondisplaced Maisonneuve's fractures heal well, and patients can return to normal activities. Follow-up care is important to monitor healing and address any functional limitations. Routine healing typically allows for gradual weight-bearing and rehabilitation as tolerated.

Complications

• Delayed union or nonunion of the fracture.
• Persistent ankle instability.
• Post-traumatic arthritis due to joint damage.
• Nerve or vascular injury in severe cases.

Lifestyle & Prevention

• Wear supportive footwear appropriate for activities.
• Use ankle braces or tape during high-risk sports.
• Improve balance and strength through exercises.
• Avoid uneven surfaces or hazardous environments that increase fall risk.

When to Seek Professional Help

Seek medical attention if you experience severe pain, inability to bear weight, worsening swelling, or signs of infection (e.g., redness, fever). Follow up with your healthcare provider if symptoms do not improve or if you notice new instability.

Tips for Medical Coders

Document the encounter type (subsequent) and healing status (routine) clearly. Confirm that the fracture is closed and nondisplaced, and note any associated injuries or treatments provided. Ensure the code aligns with the clinical documentation of follow-up care for a healing fracture.