S82.64XP Nondisplaced fracture of lateral malleolus of right fibula, subsequent encounter for closed fracture with malunion

Name of the Condition

• Nondisplaced fracture of lateral malleolus of right fibula, subsequent encounter for closed fracture with malunion
• ICD-10 Code: S82.64XP

Summary

A nondisplaced fracture of the lateral malleolus of the right fibula is a break in the outer ankle bone (fibula) where the bone remains aligned despite being fractured. This code represents a subsequent encounter for a closed fracture with malunion, indicating the fracture has healed in a non-anatomical position without the bone fragments separating. The injury typically results from trauma, such as a fall or impact, and does not involve displacement of the bone fragment.

Causes

Traumatic injuries, including falls, sports-related impacts, or direct blows to the ankle. Sudden twisting or rolling of the ankle during activities. High-impact events, such as motor vehicle collisions or athletic injuries, may also cause this type of fracture.

Risk Factors

Participation in activities with a high risk of ankle injury (e.g., contact sports, skiing). Osteoporosis or weakened bone density. Previous ankle injuries that may compromise structural integrity. Age-related changes in bone strength.

Symptoms

Pain localized to the outer ankle. Swelling and bruising around the fracture site. Difficulty bearing weight or walking. Possible visible deformity due to malunion.

Diagnosis

Physical examination of the ankle for swelling and tenderness. Imaging tests, such as X-rays, to confirm the fracture's presence and assess for malunion. Comparison with prior imaging to evaluate healing progression.

Treatment Options

Immobilization using a cast or brace to support the ankle. Physical therapy to restore strength and mobility. Pain management with over-the-counter or prescription medications. Surgical intervention may be considered for severe malunion.

Prognosis and Follow-Up

With proper care, most patients recover function, though malunion may result in long-term stiffness or discomfort. Follow-up imaging and clinical assessments are necessary to monitor healing and functional outcomes.

Complications

Chronic pain or discomfort due to malunion. Limited range of motion in the ankle. Increased risk of future fractures. Potential for arthritis in the ankle joint over time.

Lifestyle & Prevention

Avoid high-impact activities that strain the ankle. Wear supportive footwear and use ankle braces during sports. Maintain bone health through proper nutrition and exercise. Practice balance and coordination training to reduce fall risk.

When to Seek Professional Help

Persistent pain or swelling that does not improve with rest. Difficulty bearing weight or walking. Visible deformity or new symptoms. Signs of infection, such as redness, warmth, or drainage.

Tips for Medical Coders

Document the subsequent encounter status and confirmation of malunion. Include details of imaging or clinical findings that support the malunion diagnosis. Ensure the fracture is classified as closed (no skin breach) and specify the right fibula involvement.