S82.034P Nondisplaced transverse fracture of right patella, subsequent encounter for closed fracture with malunion

Name of the Condition

• Nondisplaced transverse fracture of right patella, subsequent encounter for closed fracture with malunion

Summary

This condition involves a horizontal break across the right kneecap (patella), a triangular bone that protects the knee joint. The fracture line runs perpendicular to the bone’s long axis, and the bone fragments remain aligned in their normal position (nondisplaced). The term "subsequent encounter" indicates this is a follow-up visit for the fracture, and "closed fracture with malunion" means the skin over the fracture site is intact, but the bone has healed in a misaligned position.

Causes

Direct trauma to the knee, such as a fall onto the kneecap, a blow from an object, or a forceful contraction of the quadriceps muscle. High-impact injuries, like those from sports or motor vehicle accidents, are common triggers. Malunion occurs when the fracture heals in a position that does not restore normal alignment, often due to inadequate immobilization or poor 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.
• Inadequate immobilization or noncompliance with treatment during initial healing.

Symptoms

• Persistent pain in the right knee, especially with movement.
• Swelling and bruising around the kneecap.
• Limited range of motion or difficulty straightening the knee.
• Visible or palpable deformity of the kneecap.
• Instability or a feeling of the knee "giving way."

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 scans may be used to assess the extent of malunion and its impact on joint function.

Treatment Options

• Pain management with medications or physical therapy to improve mobility.
• Bracing or casting to support the knee during healing.
• Surgical intervention, such as open reduction and internal fixation (ORIF), to realign the bone if malunion causes significant functional impairment.
• Rehabilitation to restore strength and range of motion.

Prognosis and Follow-Up

Prognosis depends on the severity of malunion and the patient’s response to treatment. Most patients experience improved function with appropriate care, but residual stiffness or pain may persist. Follow-up visits are necessary to monitor healing and adjust treatment as needed.

Complications

• Chronic pain or arthritis in the knee joint.
• Reduced range of motion or instability.
• Need for additional surgery to correct malunion.
• Increased risk of future fractures due to altered bone structure.

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 bone health through a balanced diet and regular exercise.
• Follow post-treatment guidelines to ensure proper healing.

When to Seek Professional Help

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

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with malunion. Include details about the fracture’s alignment, any surgical or nonsurgical interventions, and the patient’s functional status. Ensure documentation supports the "malunion" designation and the "subsequent encounter" context.