S82.043A Displaced comminuted fracture of unspecified patella, initial encounter for closed fracture

Name of the Condition

• Displaced comminuted fracture of unspecified patella, initial encounter for closed fracture

Summary

This condition involves a fracture of the patella (kneecap) where the bone is broken into multiple pieces and the fragments are displaced from their normal position. The fracture is closed, meaning the skin is intact, and this is the initial encounter for treatment. The severity depends on the extent of fragmentation and displacement, which can affect knee function and stability.

Causes

Direct trauma to the knee is the primary cause, often resulting from falls, motor vehicle accidents, or high-impact sports injuries. Forceful contraction of the quadriceps muscle or a direct blow to the kneecap can also lead to this type of fracture.

Risk Factors

• Participation in high-impact or contact sports.
• Osteoporosis or bone-weakening conditions.
• Advanced age, which may reduce bone density.
• Previous knee injuries or surgeries.

Symptoms

• Severe knee pain and swelling.
• Inability to straighten or bear weight on the leg.
• Visible deformity or a gap in the kneecap area.
• Tenderness and bruising around the knee.
• A "popping" sensation at the time of injury.

Diagnosis

Diagnosis typically involves a physical examination to assess knee movement and tenderness. Imaging tests, such as X-rays or CT scans, are used to confirm the fracture, evaluate fragment displacement, and plan treatment.

Treatment Options

• Immobilization with a knee brace or cast to stabilize the fracture.
• Pain management with medications or ice.
• Surgical intervention to realign and fix the fragments, if necessary.
• Physical therapy to restore knee function after healing.

Prognosis and Follow-Up

Recovery depends on the severity of the fracture and treatment. Most patients regain knee function with proper care, but stiffness or weakness may persist. Follow-up appointments monitor healing and guide rehabilitation.

Complications

• Nonunion or malunion of the fracture.
• Post-traumatic arthritis in the knee.
• Chronic pain or instability.
• Infection (rare, especially with surgery).

Lifestyle & Prevention

• Use protective gear during high-risk activities.
• Maintain bone health with calcium and vitamin D.
• Avoid falls by improving home safety (e.g., removing tripping hazards).
• Strengthen leg muscles to support the knee.

When to Seek Professional Help

Seek immediate care for severe knee pain, inability to bear weight, or visible deformity after an injury. Persistent swelling, fever, or worsening pain after treatment also requires medical attention.

Tips for Medical Coders

Document the fracture as displaced and comminuted, specify the patella as unspecified, and note the initial encounter for a closed fracture. Ensure clinical documentation supports the absence of open wounds and the initial phase of treatment.