S72.452N Displaced supracondylar fracture without intracondylar extension of lower end of left femur, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion

Name of the Condition

• Displaced supracondylar fracture without intracondylar extension of lower end of left femur, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion

Summary

This condition involves a displaced fracture at the distal (lower) end of the left femur, specifically in the supracondylar region (above the condyles), without extension into the intracondylar area. The fracture is open (type IIIA, IIIB, or IIIC), meaning the skin is breached with significant soft tissue damage, and it is a subsequent encounter for an injury that has developed nonunion (failure to heal properly). Displacement indicates the bone fragments are misaligned, potentially affecting knee stability and function.

Causes

High-impact trauma, such as falls, motor vehicle accidents, or direct blows to the thigh. Open fractures may result from trauma that penetrates the skin, such as a fall onto a sharp object or a direct impact with a fractured bone fragment. Nonunion can occur due to inadequate initial treatment, poor blood supply, infection, or excessive movement at the fracture site.

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.
• Open fractures are more likely with severe trauma or inadequate protective measures.
• Factors contributing to nonunion include poor nutrition, smoking, or underlying medical conditions like diabetes.

Symptoms

• Severe pain in the knee or thigh area, persistent or worsening over time.
• 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.
• Signs of infection, such as redness, warmth, or drainage from the open wound.
• Persistent instability or lack of healing despite prior treatment.

Diagnosis

Physical examination to assess pain, swelling, deformity, and wound status. Imaging studies, including X-rays, to evaluate fracture alignment, bone healing, and signs of nonunion. CT or MRI may be used to assess soft tissue damage, infection, or detailed fracture anatomy. Laboratory tests to check for infection or nutritional deficiencies if nonunion is suspected.

Treatment Options

Surgical intervention is often required to realign the fracture, stabilize the bone (e.g., with plates, screws, or external fixation), and address soft tissue damage. Antibiotics may be prescribed for open fractures to prevent or treat infection. Bone grafting or growth factors may be used to promote healing in cases of nonunion. Physical therapy to restore mobility and strength once the fracture is stabilized.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, soft tissue damage, and response to treatment. Nonunion may require additional interventions, and recovery can be prolonged. Regular follow-up with imaging to monitor healing and adjust treatment as needed. Long-term monitoring for complications like arthritis or chronic pain.

Complications

• Infection, particularly with open fractures.
• Nonunion or delayed union, requiring further treatment.
• Arthritis or joint stiffness due to trauma or improper healing.
• Nerve or blood vessel damage affecting limb function.
• Chronic pain or instability in the knee.
• Need for additional surgeries if initial treatment is unsuccessful.

Lifestyle & Prevention

Avoid high-risk activities or use protective gear (e.g., helmets, padding) during sports. Maintain bone health through a balanced diet rich in calcium and vitamin D, and regular weight-bearing exercise. Quit smoking, as it impairs bone healing. Follow post-injury care instructions closely to support recovery and reduce complications.

When to Seek Professional Help

Seek immediate medical attention for severe pain, visible deformity, or open wounds. Contact a healthcare provider if symptoms worsen, or if there are signs of infection (e.g., fever, increased redness, drainage). Follow up as recommended for ongoing monitoring of healing and function.

Tips for Medical Coders

Document the fracture type (supracondylar, no intracondylar extension), laterality (left femur), encounter type (subsequent), open fracture classification (IIIA, IIIB, or IIIC), and nonunion status. Ensure clinical notes specify the fracture’s anatomical details, wound characteristics, and healing progress to support code assignment. Verify that the encounter is subsequent (not initial) and that nonunion is clearly documented.