S72.456K Nondisplaced supracondylar fracture without intracondylar extension of lower end of unspecified femur, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Nondisplaced supracondylar fracture without intracondylar extension of lower end of unspecified femur, subsequent encounter for closed fracture with nonunion

Summary

This condition involves a fracture at the distal (lower) end of the femur in the supracondylar region (above the condyles), where the bone fragments remain in normal alignment (nondisplaced) and do not extend into the intracondylar area (the space between the condyles). It is classified as a closed fracture (skin intact) with nonunion, meaning the fracture has failed to heal properly during a subsequent encounter for treatment. This type of fracture can affect knee stability and function depending on the severity of the injury.

Causes

High-impact trauma, such as falls, motor vehicle accidents, or direct blows to the thigh. Sports injuries or physical altercations. Stress fractures from repetitive overuse or strenuous activity. Nonunion may result from inadequate immobilization, poor blood supply to the fracture site, or infection.

Risk Factors

• Advanced age, which may lead to decreased bone density.
• Osteoporosis or other bone-weakening conditions.
• Participation in high-risk activities or contact sports.
• Prior history of femur fractures or bone disorders.
• Smoking or poor nutrition, which can impair bone healing.

Symptoms

• Persistent pain in the knee or thigh region, often worsening with activity.
• Swelling, bruising, or visible deformity of the affected leg.
• Inability to bear weight or move the leg normally.
• Possible numbness or tingling if nerves are involved.
• Delayed healing or lack of improvement in symptoms over time.

Diagnosis

Physical examination to assess pain, swelling, and limb alignment. Imaging studies, such as X-rays or CT scans, to confirm the fracture and evaluate for nonunion. Assessment of healing progress through serial imaging. Evaluation of blood flow and nerve function if indicated.

Treatment Options

• Immobilization with a cast or brace to stabilize the fracture.
• Surgical intervention, such as internal fixation with plates or screws, to promote healing.
• Bone grafting to stimulate bone growth at the nonunion site.
• Physical therapy to restore strength and mobility once healing is underway.
• Pain management with medications or other modalities.

Prognosis and Follow-Up

Prognosis depends on the success of treatment and the patient’s overall health. Nonunion may require additional interventions, such as surgery, to achieve healing. Regular follow-up with imaging is necessary to monitor progress. Long-term outcomes may include reduced mobility or chronic pain if healing is incomplete.

Complications

• Chronic pain or instability in the knee.
• Infection at the fracture site or surgical site.
• Nerve or blood vessel damage.
• Delayed or failed healing (nonunion).
• Post-traumatic arthritis in the knee joint.

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.
• Quit smoking, as it impairs bone healing.
• Use protective equipment during sports or high-risk activities.
• Engage in weight-bearing exercises to strengthen bones, as recommended.

When to Seek Professional Help

• Severe or worsening pain that does not improve with rest or medication.
• Increased swelling, bruising, or deformity.
• Inability to move the leg or bear weight.
• Signs of infection, such as fever, redness, or drainage from the skin.
• Numbness, tingling, or weakness in the leg or foot.

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with nonunion. Ensure the record specifies the fracture location (supracondylar, no intracondylar extension) and the status of healing (nonunion). Include details on treatment provided, such as immobilization or surgical intervention, to support code assignment. Verify that the fracture is classified as closed (skin intact) and that nonunion is explicitly documented.