S82.021K Displaced longitudinal fracture of right patella, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Displaced longitudinal fracture of right patella, subsequent encounter for closed fracture with nonunion

Summary

A displaced longitudinal fracture of the right patella is a vertical break in the kneecap where bone fragments are misaligned. This entry represents a subsequent encounter for a closed fracture that has failed to heal (nonunion). Nonunion occurs when the fracture site does not fully unite, requiring ongoing management to address healing delays and functional impairment.

Causes

Direct trauma to the knee, such as a fall onto the kneecap, a forceful blow, or sudden quadriceps muscle contraction. High-impact events like motor vehicle accidents or sports injuries are common triggers. Nonunion may develop due to inadequate initial treatment, poor blood supply to the fracture site, or excessive movement before healing.

Risk Factors

• Participation in high-risk activities or contact sports.
• Osteoporosis or other bone-weakening conditions.
• Advanced age, which may reduce bone density.
• Previous knee injuries or surgeries.
• Smoking or poor nutrition, which can impair bone healing.

Symptoms

• Persistent pain and swelling in the knee.
• Visible deformity or misalignment of the kneecap.
• Inability to fully straighten or bend the knee.
• Bruising or tenderness around the fracture site.
• Lack of improvement in symptoms over time, indicating nonunion.

Diagnosis

Physical examination to assess knee alignment, stability, and tenderness. Imaging tests, such as X-rays or CT scans, to confirm nonunion by evaluating bone healing and displacement. MRI may be used to assess soft tissue damage or blood supply if needed.

Treatment Options

• Surgical intervention: Realignment and stabilization with hardware (e.g., screws, wires) to promote healing.
• Bone grafting: Transplanting bone tissue to stimulate union in cases of severe nonunion.
• Immobilization: Use of a brace or cast to limit movement and support healing.
• Physical therapy: Gradual rehabilitation to restore knee function and strength.

Prognosis and Follow-Up

Prognosis depends on the severity of nonunion and response to treatment. Most patients achieve improved function with appropriate intervention, but recovery may take several months. Regular follow-up imaging and clinical assessments are necessary to monitor healing progress.

Complications

• Chronic pain or instability in the knee.
• Arthritis or joint damage due to prolonged misalignment.
• Infection (rare, but possible with surgical intervention).
• Reduced range of motion or mobility.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Maintain a balanced diet rich in calcium and vitamin D to support bone health.
• Use protective gear during sports or activities with fall risks.
• Follow post-treatment guidelines to minimize re-injury.

When to Seek Professional Help

Seek immediate care if you experience severe pain, swelling, or deformity after a knee injury. Contact your provider if symptoms worsen or fail to improve with treatment, as this may indicate nonunion or other complications.

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with nonunion. Include details on fracture alignment, healing status, and any surgical or therapeutic interventions. Ensure documentation supports the nonunion diagnosis and subsequent encounter context.