S72.461N Displaced supracondylar fracture with intracondylar extension of lower end of right femur, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion

Name of the Condition

• Displaced supracondylar fracture with intracondylar extension of lower end of right 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 right femur, extending from the supracondylar region (above the condyles) into the intracondylar area (within the condyles). The fracture is classified as an open fracture type IIIA, IIIB, or IIIC, indicating significant soft tissue damage, and is associated with nonunion, meaning the bone has failed to heal properly after prior treatment. The injury disrupts the structural integrity of the knee joint, potentially affecting stability and function due to the involvement of both the metaphyseal region and the articular surface of the condyles.

Causes

High-impact trauma, such as falls, motor vehicle accidents, or direct force to the knee. Sports injuries involving sudden twisting or axial loading. Low-energy trauma in individuals with weakened bone density may also result in this fracture pattern.

Risk Factors

• Advanced age and associated bone density loss.
• Osteoporosis or other metabolic bone disorders.
• Participation in high-risk activities or contact sports.
• Prior history of knee or femur injuries.
• Conditions affecting bone strength, such as chronic steroid use.
• Inadequate initial treatment or poor healing environment.

Symptoms

• Severe knee pain and swelling.
• Bruising or visible deformity around the knee.
• Inability to bear weight or move the leg normally.
• Possible numbness or tingling if nerves are involved.
• Persistent pain or instability indicating nonunion.

Diagnosis

Physical examination to assess pain, swelling, and limb alignment. Imaging studies, such as X-rays or CT scans, to evaluate fracture pattern, displacement, and signs of nonunion. Assessment of soft tissue damage to classify the open fracture type. Review of prior treatment and healing progress to confirm nonunion.

Treatment Options

Surgical intervention to realign and stabilize the fracture, often using internal fixation devices. Bone grafting may be necessary to promote healing in cases of nonunion. Management of soft tissue injuries, including wound care and possible skin grafting for severe open fractures. Physical therapy to restore function and strength after healing.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, soft tissue damage, and success of treatment. Nonunion may require additional interventions, such as revision surgery or bone stimulation techniques. Regular follow-up with imaging to monitor healing and function. Long-term rehabilitation to address mobility and joint stability.

Complications

Delayed or failed healing (nonunion). Infection, particularly in open fractures. Nerve or vascular damage affecting limb function. Post-traumatic arthritis due to joint surface disruption. Chronic pain or instability.

Lifestyle & Prevention

Avoid high-risk activities that increase fracture risk. Maintain bone health through adequate nutrition and exercise. Use protective gear during sports or activities with fall potential. Follow post-injury rehabilitation protocols to support healing.

When to Seek Professional Help

Persistent pain, swelling, or deformity after injury. Inability to bear weight or move the leg. Signs of infection, such as fever, redness, or drainage from the wound. Numbness, tingling, or changes in skin color indicating nerve or vascular involvement.

Tips for Medical Coders

Document the fracture type (IIIA, IIIB, or IIIC) and confirmation of nonunion to support the code. Include details of prior treatment and healing status. Specify the right femur and the displaced supracondylar with intracondylar extension pattern. Ensure the encounter is classified as "subsequent" to reflect ongoing care for the nonunion.