S82.864J Nondisplaced Maisonneuve's fracture of right leg, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing

Name of the Condition

• Nondisplaced Maisonneuve's fracture of right 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 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 for open fracture type IIIA, IIIB, or IIIC" designation specifies this is a follow-up visit for an open fracture with significant soft tissue damage, where the wound is either severely contaminated (IIIA), has extensive soft tissue loss (IIIB), or involves arterial injury (IIIC). The "delayed healing" modifier indicates the fracture has not progressed as expected during the normal healing timeline.

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. The open nature of the fracture suggests the injury involved a forceful impact that broke the skin, such as a direct blow or a severe twist. Delayed healing may result from factors like 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 fracture complications, such as infection or severe soft tissue damage, which can impede healing.

Symptoms

• Persistent 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 or open area at the fracture site (for open fractures).
• Signs of delayed healing, such as lack of progress in imaging or prolonged pain.

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and instability, along with imaging studies like X-rays or CT scans to confirm the fracture and evaluate alignment. The open fracture type is determined by assessing the wound size, contamination, and soft tissue damage. Delayed healing is identified through follow-up imaging showing insufficient bone callus formation or persistent fracture lines. Clinical notes should document the fracture type, healing status, and any complications.

Treatment Options

Treatment focuses on stabilizing the fracture and addressing the open wound. This may include surgical fixation (e.g., plates or screws) to realign the fibula, debridement of the open wound to reduce infection risk, and antibiotics for contaminated fractures. Immobilization with a cast or brace is typically used, and weight-bearing restrictions are applied. For delayed healing, additional interventions like 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 open fracture and the success of treatment. Open fractures with significant soft tissue damage (IIIB/IIIC) or infection have a higher risk of complications and longer recovery times. Delayed healing may extend the recovery period, requiring closer monitoring. Follow-up visits are essential to assess healing through imaging and clinical evaluation, adjust treatment as needed, and manage any complications. Most patients eventually regain ankle stability, but some may experience long-term stiffness or weakness.

Complications

• Infection, particularly in open fractures with severe contamination.
• Nonunion or malunion of the fracture due to delayed healing.
• Chronic ankle instability or arthritis.
• Nerve or vascular damage, especially in type IIIC fractures.
• Prolonged pain or functional limitations.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use proper footwear and avoid uneven surfaces to reduce fall risk.
• Engage in physical therapy to strengthen ankle muscles and improve stability.
• Follow post-treatment guidelines for weight-bearing and activity restrictions.
• Maintain a healthy diet and avoid smoking, which can impair bone healing.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or inability to bear weight, or if the wound shows signs of infection (e.g., redness, pus, fever). Contact your healthcare provider if pain persists, healing does not progress as expected, or you notice new symptoms like numbness or discoloration.

Tips for Medical Coders

Document the fracture type (IIIA, IIIB, or IIIC) and the presence of delayed healing clearly in the medical record. Ensure the encounter is coded as "subsequent" to reflect follow-up care. Note any surgical interventions, wound debridement, or antibiotic use, as these may impact coding. Verify that the fracture is confirmed as nondisplaced and that the open wound characteristics align with the specified type.