S82.866E Nondisplaced Maisonneuve's fracture of unspecified leg, subsequent encounter for open fracture type I or II with routine healing

Name of the Condition

• Nondisplaced Maisonneuve's fracture of unspecified leg, subsequent encounter for open fracture type I or II 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 "subsequent encounter" designation refers to follow-up care after the initial treatment phase, and "open fracture type I or II" indicates a fracture where the skin is breached, with type I involving a wound less than 1 cm and type II involving a wound 1–10 cm without extensive soft tissue damage or contamination. "Routine healing" signifies that 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. Open fractures occur when the force is sufficient to penetrate the skin, often due to high-energy trauma or a sharp bone fragment piercing the tissue. Routine healing suggests the injury is responding appropriately to treatment.

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."
• Visible wound at the fracture site (for open fractures).
• Bruising or discoloration around the injury.

Diagnosis

Diagnosis typically involves a physical examination to assess pain, swelling, and stability, followed by imaging studies such as X-rays to confirm the fracture and its alignment. CT or MRI may be used to evaluate associated ligament or soft tissue damage. The "subsequent encounter" status implies prior documentation of the injury and treatment, with follow-up imaging to confirm routine healing. Clinical assessment of the wound (for open fractures) and monitoring of healing progress are also part of the diagnostic process.

Treatment Options

Treatment focuses on stabilizing the fracture and promoting healing. This may include immobilization with a cast or brace, pain management, and monitoring for infection (especially in open fractures). Physical therapy is often recommended to restore strength and mobility once healing allows. Routine healing suggests that standard treatment protocols are effective, with no need for surgical intervention at this stage.

Prognosis and Follow-Up

With proper treatment and routine healing, most patients recover fully, though recovery time may vary. Follow-up care is essential to monitor healing progress, assess functional recovery, and address any residual symptoms. Long-term prognosis is generally good, but some patients may experience chronic ankle instability or stiffness. Regular imaging and clinical evaluations help ensure the fracture heals without complications.

Complications

• Infection (more common in open fractures).
• Delayed healing or nonunion of the fracture.
• Chronic ankle instability or pain.
• Stiffness or reduced range of motion.
• Nerve or vascular damage (rare).

Lifestyle & Prevention

• Wear appropriate footwear for activities to reduce fall risk.
• Strengthen ankle muscles through targeted exercises.
• Avoid uneven or slippery surfaces.
• Use protective gear during high-risk sports.
• Maintain bone health through adequate nutrition and exercise.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, inability to bear weight, visible deformity, or signs of infection (e.g., redness, pus, fever). Follow up with your healthcare provider if symptoms worsen or do not improve as expected during the healing process.

Tips for Medical Coders

Document the fracture type (open I or II), healing status (routine), and encounter type (subsequent) clearly. Ensure clinical notes support the "routine healing" designation, including absence of complications or delayed healing. Verify that the injury is a Maisonneuve's fracture with proximal fibula involvement and associated syndesmotic ligament tear. Code S82.866E is specific to the subsequent encounter phase with routine healing for open fracture types I or II.