S82.53XK Displaced fracture of medial malleolus of unspecified tibia, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Displaced fracture of medial malleolus of unspecified tibia, subsequent encounter for closed fracture with nonunion

Summary

A displaced fracture of the medial malleolus of the tibia is a break in the inner bony prominence of the lower leg near the ankle, where the bone fragments are misaligned. This injury affects ankle joint stability and may require specific treatment to restore alignment and function. The term "subsequent encounter" indicates this is a follow-up visit for the fracture, and "closed fracture with nonunion" means the fracture site remains intact (no open wound), but the bone has failed to heal properly after an expected period.

Causes

Direct trauma, such as falls, sports injuries, or motor vehicle accidents, is the primary cause. Twisting motions or high-impact forces applied to the ankle can also lead to this type of fracture. Nonunion may result from inadequate immobilization, poor blood supply to the fracture site, infection, or excessive movement during healing.

Risk Factors

• Participation in activities with a high risk of ankle injury, such as contact sports or skiing.
• Osteoporosis or other bone-weakening conditions.
• Previous ankle injuries or surgeries.
• Advanced age, which may reduce bone density.
• Smoking or other factors that impair bone healing.

Symptoms

• Persistent pain at the ankle, especially with weight-bearing.
• Swelling and bruising around the medial malleolus.
• Difficulty bearing weight on the affected leg.
• Visible deformity or misalignment of the ankle.
• Tenderness to touch at the fracture site.

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and range of motion. Imaging studies, such as X-rays or CT scans, are used to confirm the fracture and evaluate for nonunion. The provider will also review the patient’s medical history and prior treatment to determine the cause of nonunion.

Treatment Options

Treatment may include surgical intervention to realign and stabilize the fracture, such as internal fixation with screws or plates. Bone grafting may be necessary to promote healing. Non-surgical options, like prolonged immobilization or electrical stimulation, may be considered in select cases. Physical therapy is often recommended to restore function and strength.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the effectiveness of treatment. Successful healing can restore ankle stability and function, but some patients may experience long-term stiffness or pain. Regular follow-up with imaging is typically required to monitor healing progress.

Complications

• Chronic pain or instability of the ankle.
• Arthritis in the ankle joint.
• Nerve or blood vessel damage.
• Infection (if surgical intervention is performed).
• Difficulty returning to pre-injury activity levels.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use protective gear during sports or activities with ankle injury risk.
• Maintain bone health through a balanced diet rich in calcium and vitamin D.
• Follow post-treatment instructions carefully to support healing.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or deformity after an injury, or if you notice worsening symptoms during recovery. Contact your provider if pain persists or interferes with daily activities.

Tips for Medical Coders

This code is used for a displaced fracture of the medial malleolus of the tibia during a subsequent encounter when the fracture is closed and has not healed (nonunion). Document the encounter type (subsequent), fracture status (closed), and confirmation of nonunion (e.g., imaging or clinical findings) to support coding. Ensure the fracture is specified as displaced and involves the medial malleolus of the tibia.