S82.099 Other fracture of unspecified patella

Name of the Condition

• Other fracture of unspecified patella

Summary

This condition refers to a fracture of the patella (kneecap) that does not fall into more specific fracture categories. The term "other" indicates a fracture type that is documented but not classified under standard subtypes, such as transverse, vertical, or osteochondral fractures. The injury involves a break in the patella, with details about the fracture pattern or displacement varying based on the specific case. The "unspecified" designation indicates that the side (right or left) is not documented.

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, motor vehicle accidents, or falls, are common triggers. The "other" designation may reflect unique fracture patterns not covered by more specific codes.

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.

Symptoms

• Sudden, severe pain in the knee.
• Swelling and bruising around the kneecap.
• Inability to straighten the knee or bear weight.
• Visible deformity or a gap in the kneecap area.
• A "popping" sensation at the time of injury.

Diagnosis

A physical examination to assess knee movement, swelling, and deformity is typically performed. Imaging studies, such as X-rays, are used to confirm the fracture and evaluate its characteristics. Additional tests, like CT or MRI, may be ordered if the fracture pattern is unclear or if soft tissue damage is suspected.

Treatment Options

Treatment depends on the fracture type, displacement, and patient factors. Non-displaced fractures may be managed with immobilization (e.g., a cast or brace) and pain relief. Displaced or complex fractures often require surgical intervention, such as open reduction and internal fixation, to realign and stabilize the bone. Physical therapy is usually recommended during recovery to restore function.

Prognosis and Follow-Up

Most patellar fractures heal well with appropriate treatment, but recovery time varies. Non-displaced fractures may heal in 6–8 weeks, while surgical cases may take longer. Follow-up appointments monitor healing and functional progress. Long-term outcomes depend on fracture severity, treatment adherence, and rehabilitation.

Complications

• Nonunion or malunion of the fracture.
• Post-traumatic arthritis due to joint damage.
• Chronic pain or stiffness.
• Infection (if surgery is performed).
• Reduced range of motion or weakness.

Lifestyle & Prevention

• Use protective gear during high-risk activities (e.g., knee pads in sports).
• Maintain bone health through adequate calcium and vitamin D intake.
• Avoid falls by using assistive devices if balance is impaired.
• Strengthen knee muscles through regular exercise to improve stability.

When to Seek Professional Help

Seek immediate medical attention if you experience severe knee pain, inability to bear weight, visible deformity, or a "popping" sensation after injury. Persistent pain, swelling, or difficulty moving the knee after initial treatment also warrants evaluation.

Tips for Medical Coders

Document the fracture type (e.g., "other") and specify if the side is unknown. Ensure clinical notes support the "unspecified" designation if side is not documented. Verify that the injury is isolated to the patella and not associated with other knee structures unless separately coded.