S82.123K Displaced fracture of lateral condyle of unspecified tibia, subsequent encounter for closed fracture with nonunion

Name of the Condition

Displaced fracture of lateral condyle of unspecified tibia, subsequent encounter for closed fracture with nonunion

Summary

This condition involves a displaced fracture of the lateral condyle of the tibia, a bony prominence on the outer side of the upper tibia that contributes to knee joint stability. The fracture is displaced, meaning the bone fragments are out of their normal alignment, and it is classified as a closed fracture (no open wound) during a subsequent encounter. The term "nonunion" indicates that the fracture has failed to heal properly after an expected period.

Causes

Traumatic injury to the knee, such as falls, sports-related impacts, or motor vehicle accidents, is the primary cause. Direct force to the lateral knee or twisting injuries can lead to this fracture. Nonunion may result from inadequate immobilization, poor blood supply to the fracture site, infection, or excessive movement during healing.

Risk Factors

• Participation in high-impact or contact sports.
• Osteoporosis or other bone-weakening conditions.
• Previous knee injuries or surgeries.
• Advanced age, which may reduce bone density.
• Smoking or other factors that impair bone healing.
• Inadequate initial treatment or follow-up care.

Symptoms

• Persistent pain, swelling, and tenderness localized to the lateral knee.
• Difficulty bearing weight on the affected leg.
• Possible visible deformity or misalignment.
• Bruising or discoloration around the injury site.
• Limited range of motion in the knee joint.

Diagnosis

Physical examination to assess pain, swelling, and joint stability. Imaging tests, such as X-rays or CT scans, to evaluate fracture type, displacement, and signs of nonunion (e.g., a persistent fracture line with no bridging bone). Additional tests may assess blood flow or infection if needed.

Treatment Options

• Surgical intervention to realign and stabilize the fracture, often with bone grafting to promote healing.
• Immobilization with a cast or brace to limit movement.
• Physical therapy to restore strength and mobility once healing progresses.
• Medications to manage pain or address underlying conditions like osteoporosis.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and response to treatment. Follow-up imaging and clinical assessments are typically required to monitor healing. Recovery may be prolonged, and some functional limitations could persist.

Complications

• Chronic pain or instability in the knee joint.
• Arthritis due to joint damage.
• Infection, particularly if surgical intervention is needed.
• Nerve or blood vessel damage near the fracture site.
• Difficulty returning to pre-injury activity levels.

Lifestyle & Prevention

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

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or inability to bear weight, or if symptoms worsen after initial treatment. Contact your provider if you notice signs of infection (e.g., redness, warmth, fever) or if pain persists beyond expected healing timelines.

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with nonunion. Ensure clinical notes specify the fracture’s displacement, the absence of an open wound, and confirmation of nonunion (e.g., imaging or provider assessment). Code S82.123K is appropriate when the fracture is closed, displaced, and nonunion is present during a follow-up encounter.