S72.453K Displaced supracondylar fracture without intracondylar extension of lower end of unspecified femur, subsequent encounter for closed fracture with nonunion

Name of the Condition

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

Summary

This condition involves a displaced fracture at the distal (lower) end of the femur, specifically in the supracondylar region (above the condyles). The fracture does not extend into the intracondylar area (the space between the condyles), distinguishing it from more complex knee joint fractures. Displacement means the bone fragments are out of their normal alignment, potentially affecting knee stability and function. This is a subsequent encounter for a closed fracture with nonunion, indicating the fracture has failed to heal properly after prior treatment, and the skin remains intact with no open wound.

Causes

High-impact trauma, such as falls, motor vehicle accidents, or direct blows to the thigh. Sports injuries or physical altercations involving force to the knee or thigh. Stress fractures from repetitive overuse or strenuous activity, though less common for this specific type. Nonunion may result from inadequate immobilization, poor blood supply, infection, or excessive movement during healing.

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.
• Certain medical conditions, such as diabetes or vascular disease, that affect circulation.

Symptoms

• Persistent pain in the knee or thigh area, often worsening with activity.
• Swelling, bruising, or visible deformity around the knee.
• Inability to bear weight or move the knee joint properly.
• Possible numbness or tingling if nerves are involved.
• A noticeable gap or abnormal movement at the fracture site.

Diagnosis

Physical examination to assess pain, swelling, and deformity. Imaging studies, such as X-rays, CT scans, or MRI, to confirm the fracture and evaluate for nonunion. Assessment of healing progress through serial imaging. Evaluation of blood supply and soft tissue damage. Review of prior treatment and immobilization history.

Treatment Options

• Surgical intervention, such as internal fixation with plates or screws, to stabilize the fracture.
• Bone grafting to promote healing in cases of nonunion.
• External fixation devices for additional stability.
• Physical therapy to restore mobility and strength.
• Pain management with medications or other modalities.
• Close monitoring to ensure proper healing.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, patient health, and response to treatment. Nonunion may require additional interventions to achieve healing. Regular follow-up appointments with imaging to assess progress. Long-term monitoring for complications, such as arthritis or chronic pain. Rehabilitation to optimize functional recovery.

Complications

• Chronic pain or stiffness in the knee.
• Arthritis or joint degeneration.
• Nerve or blood vessel damage.
• Infection, particularly if surgery is required.
• Delayed or failed healing (nonunion or malunion).
• Reduced mobility or disability.

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.
• Engage in weight-bearing exercises to strengthen bones.
• Use protective gear during sports or high-risk activities.
• Quit smoking and limit alcohol, as both can impair healing.
• Follow post-treatment instructions carefully to promote proper healing.

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 knee or bear weight.
• Signs of infection, such as fever, redness, or drainage.
• Numbness, tingling, or weakness in the leg or foot.
• Any concerns about healing progress or new symptoms.

Tips for Medical Coders

Document the fracture type (displaced supracondylar without intracondylar extension), location (lower end of unspecified femur), encounter type (subsequent), and fracture status (closed with nonunion). Include details on prior treatment, healing progress, and any interventions for nonunion. Ensure documentation supports the nonunion diagnosis and subsequent encounter context.