S82.012K Displaced osteochondral fracture of left patella, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Displaced osteochondral fracture of left patella, subsequent encounter for closed fracture with nonunion

Summary

This condition involves a displaced fracture of the left patella (kneecap) that includes damage to the adjacent cartilage (osteochondral injury). The fracture is closed, meaning the skin is intact, and it is a subsequent encounter for a closed fracture that has failed to heal (nonunion). Displacement indicates that bone fragments are out of their normal alignment, and nonunion means the fracture site has not united after an expected healing period.

Causes

Direct trauma to the knee, such as a fall onto the kneecap, a forceful blow, or a high-impact injury (e.g., motor vehicle accident or sports injury). The displacement occurs when the force is sufficient to separate the bone-cartilage fragment from the main patella. Nonunion may result from inadequate immobilization, poor blood supply to the fracture site, or excessive movement during healing.

Risk Factors

• Participation in activities with a high risk of knee injury, such as contact sports or skiing.
• 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.

Symptoms

• Persistent pain in the left knee, often worsening with activity.
• Swelling and bruising around the kneecap that may not resolve over time.
• Inability to fully straighten or bear weight on the left knee.
• Visible deformity or a gap in the kneecap area.
• A "popping" sensation at the time of injury, which may persist.

Diagnosis

A physical examination to assess knee movement, swelling, and tenderness. Imaging studies, typically X-rays, to confirm the fracture and evaluate bone alignment. CT or MRI may be used to assess cartilage damage and confirm nonunion. Follow-up imaging may be required to monitor healing progress.

Treatment Options

• Immobilization with a brace or cast to stabilize the knee and promote healing.
• Physical therapy to restore range of motion and strength.
• Pain management with medications or injections.
• Surgical intervention, such as internal fixation or bone grafting, if nonunion persists or displacement is severe.
• Monitoring for complications, including infection or further joint damage.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, adherence to treatment, and overall health. Nonunion may require extended recovery or additional interventions. Regular follow-up with imaging and physical exams is essential to assess healing and adjust treatment as needed. Long-term outcomes may include persistent pain or reduced knee function.

Complications

• Chronic pain or arthritis in the knee joint.
• Limited range of motion or stiffness.
• Infection, particularly if surgical intervention is required.
• Nerve or blood vessel damage near the fracture site.
• Need for additional surgeries if nonunion or displacement recurs.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use protective gear during sports or activities with a risk of knee injury.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.
• Follow post-injury rehabilitation plans to optimize healing.
• Quit smoking, as it can impair bone healing.

When to Seek Professional Help

• Severe or worsening pain that does not improve with rest or medication.
• Increased swelling, redness, or warmth around the knee.
• Inability to bear weight on the left leg.
• Signs of infection, such as fever or pus drainage.
• New or worsening deformity in the kneecap area.

Tips for Medical Coders

This code is used for a subsequent encounter of a closed displaced osteochondral fracture of the left patella with nonunion. Documentation should specify the fracture type (closed), laterality (left), and the presence of nonunion. Ensure the encounter is classified as "subsequent" and that the fracture is confirmed as nonunion through imaging or clinical assessment. Avoid using this code for initial encounters or open fractures.