S82.015K Nondisplaced osteochondral fracture of left patella, subsequent encounter for closed fracture with nonunion

Name of the Condition

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

Summary

This condition involves a fracture of the left patella (kneecap) where a portion of the bone and its attached cartilage is damaged but remains in its normal anatomical position. The term "nondisplaced" indicates that the fracture fragments are not separated or misaligned. The "closed fracture" designation means the overlying skin is intact, and "subsequent encounter" refers to follow-up care for the injury. The "nonunion" component signifies that the fracture has failed to heal properly after an expected period.

Causes

Direct trauma to the left 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 fracture occurs when the force is sufficient to damage both the bone and cartilage but not enough to displace the fragments. Nonunion may result from inadequate immobilization, poor blood supply to the fracture site, or other factors that impede 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.
• Inability to fully straighten or bear weight on the left knee.
• A "popping" or grinding sensation during knee movement.
• Possible instability or weakness in the knee.

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. Additional tests, such as bone scans, may be performed to evaluate healing progress.

Treatment Options

Treatment focuses on promoting fracture healing and restoring function. Options may include immobilization with a brace or cast, physical therapy to strengthen surrounding muscles, and pain management. Surgical intervention, such as bone grafting or internal fixation, may be considered if nonunion persists or causes significant symptoms.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the effectiveness of treatment. Most patients experience improved function with appropriate care, though recovery may be prolonged. Regular follow-up appointments are necessary to monitor healing and adjust treatment as needed. Long-term outcomes may include residual pain or stiffness in some cases.

Complications

• Chronic pain or instability in the knee.
• Increased risk of arthritis due to cartilage damage.
• Potential need for additional surgery if nonunion does not heal.
• Reduced mobility or difficulty with daily activities.

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 rehabilitation guidelines to strengthen the knee and prevent future injuries.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or inability to bear weight on the left knee. Contact your healthcare provider if symptoms worsen or do not improve with treatment, or if you notice new or worsening instability in the knee.

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with nonunion. Ensure the left patella is specified and that the nonunion is clearly noted in the clinical record. Verify that the fracture is nondisplaced and that the encounter is not an initial or acute phase of care. Include details about the fracture's status and any treatments provided to support accurate coding.