S82.016 Nondisplaced osteochondral fracture of unspecified patella

Name of the Condition

• Nondisplaced osteochondral fracture of unspecified patella

Summary

This condition involves a fracture of the patella (kneecap) where a portion of the bone and its attached cartilage is damaged but remains in its normal anatomical position. The injury affects both the bony and cartilaginous structures, with the cartilage component distinguishing it from other patellar fractures. The term "nondisplaced" indicates that the fracture fragments are not separated or misaligned.

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. The trauma must be sufficient to damage both bone and cartilage without causing displacement.

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.
• A "popping" sensation at the time of injury.

Diagnosis

A physical examination to assess knee movement, swelling, and tenderness. Imaging studies, typically X-rays, to confirm the fracture and evaluate bone alignment. In some cases, a CT scan or MRI may be used to assess cartilage damage or complex fractures.

Treatment Options

• Immobilization with a brace or cast to allow healing.
• Pain management with medications or ice.
• Physical therapy to restore strength and mobility.
• Surgical intervention if the fracture is unstable or involves significant cartilage damage.

Prognosis and Follow-Up

Most nondisplaced fractures heal well with conservative treatment, but recovery may take several weeks to months. Follow-up imaging and physical therapy are often recommended to monitor healing and restore function. Long-term outcomes depend on the extent of cartilage damage and adherence to rehabilitation.

Complications

• Delayed healing or nonunion of the fracture.
• Post-traumatic arthritis due to cartilage damage.
• Chronic pain or stiffness in the knee.
• Reduced range of motion.

Lifestyle & Prevention

• Use protective gear during high-risk activities.
• Maintain bone health through diet and exercise.
• Avoid sudden, forceful movements that strain the knee.
• Warm up properly before physical activity.

When to Seek Professional Help

Seek immediate medical attention if you experience severe knee pain, swelling, or an inability to bear weight after an injury. Persistent pain, instability, or difficulty moving the knee after initial treatment also warrants evaluation.

Tips for Medical Coders

Document the nondisplaced nature of the fracture and the involvement of both bone and cartilage. Specify the patella as "unspecified" if the laterality is not documented. Ensure the diagnosis aligns with clinical findings and imaging results to support accurate coding.