S82.865J Nondisplaced Maisonneuve's fracture of left leg, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing

Name of the Condition

• Nondisplaced Maisonneuve's fracture of left leg, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed 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 aligned. This injury typically results from rotational forces applied to the ankle, leading to joint instability. The "subsequent encounter" designation specifies this is a follow-up visit after the initial treatment, while "open fracture type IIIA, IIIB, or IIIC" refers to fractures with severe soft tissue damage and contamination. "Delayed healing" indicates the fracture has not progressed as expected during the normal healing timeline.

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. Open fractures occur when the broken bone pierces the skin, typically due to high-energy trauma or direct impact. Delayed healing may result from factors such as poor blood supply, infection, or inadequate immobilization.

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.
• Open fractures with severe soft tissue damage, which increase infection risk and healing challenges.

Symptoms

• Persistent pain and swelling localized to the proximal fibula and ankle.
• Difficulty bearing weight on the affected leg.
• Visible wound or open area if the fracture is open.
• Signs of delayed healing, such as lack of progress on imaging or prolonged pain.

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and instability. Imaging studies, such as X-rays or CT scans, are used to confirm the fracture and evaluate alignment. For open fractures, assessment of the wound and surrounding tissue damage is critical. Delayed healing is diagnosed when imaging shows insufficient bone callus formation or persistent fracture lines over time.

Treatment Options

Treatment focuses on stabilizing the fracture and promoting healing. This may include immobilization with a cast or brace, surgical fixation if instability is present, and management of the open wound to prevent infection. For delayed healing, additional interventions such as bone grafting or electrical stimulation may be considered. Physical therapy is often recommended to restore function once healing progresses.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, soft tissue damage, and response to treatment. Open fractures with severe contamination carry a higher risk of complications, which may delay recovery. Regular follow-up visits are necessary to monitor healing progress, adjust treatment, and address any issues such as infection or nonunion. Most patients can expect gradual improvement, but full recovery may take several months.

Complications

• Infection, particularly with open fractures.
• Nonunion or delayed union of the fracture.
• Chronic ankle instability or pain.
• Nerve or vascular damage from the initial injury or surgery.
• Post-traumatic arthritis due to joint damage.

Lifestyle & Prevention

• Avoid high-risk activities until fully healed and cleared by a healthcare provider.
• Use proper footwear and protective gear during sports.
• Maintain bone health through a balanced diet and regular exercise.
• Follow post-injury rehabilitation guidelines to restore strength and stability.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or an open wound after an injury. Contact your healthcare provider if you notice signs of infection (e.g., redness, pus, fever) or if pain and swelling worsen despite treatment. Follow up as scheduled to monitor healing progress.

Tips for Medical Coders

This code is specific to a nondisplaced Maisonneuve's fracture of the left leg, with a subsequent encounter for an open fracture classified as type IIIA, IIIB, or IIIC, and delayed healing. Documentation should clearly indicate the fracture type, laterality, encounter stage, open fracture severity, and evidence of delayed healing (e.g., imaging reports or clinical notes). Ensure alignment with the ICD-10-CM coding guidelines for fracture classification and encounter codes.