S82.013G Displaced osteochondral fracture of unspecified patella, subsequent encounter for closed fracture with delayed healing

Name of the Condition

• Displaced osteochondral fracture of unspecified patella, subsequent encounter for closed fracture with delayed healing

Summary

This condition involves a fracture of the patella (kneecap) where a portion of the bone and its attached cartilage is displaced from its normal position. The fracture affects both the bony and cartilaginous structures, and the displacement indicates that the fragments are not aligned properly. The term "subsequent encounter" specifies this is a follow-up visit for the injury, "closed fracture" means the skin over the fracture site remains intact, and "delayed healing" indicates the fracture is not progressing as expected during the normal healing timeline.

Causes

Direct trauma to the knee, such as a fall onto the kneecap, a forceful blow, or a high-impact injury (e.g., motor vehicle accident or sports injury). The displacement occurs when the force is sufficient to separate the bone-cartilage fragment from the main patella. Delayed healing may result from inadequate immobilization, poor blood supply to the fracture site, or underlying health conditions affecting bone repair.

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.
• Smoking or poor nutrition, which can impair healing.
• Certain medications (e.g., corticosteroids) that affect bone metabolism.

Symptoms

• Persistent pain in the knee, especially with movement or weight-bearing.
• Swelling and bruising around the kneecap that does not improve over time.
• Limited range of motion in the knee.
• Difficulty bearing weight on the affected leg.
• A sense of instability or "giving way" in the knee.

Diagnosis

A physical examination to assess knee movement, swelling, and tenderness. Imaging studies, typically X-rays, to evaluate fracture alignment and healing progress. Additional tests, such as MRI or CT scans, may be used to assess cartilage damage or blood supply to the fracture site. Blood tests may be ordered to check for underlying conditions affecting healing.

Treatment Options

• Immobilization with a brace or cast to stabilize the knee and promote healing.
• Pain management with medications (e.g., NSAIDs) or physical therapy.
• Surgical intervention, such as internal fixation, if the fracture remains displaced or healing is severely delayed.
• Bone grafting or other procedures to stimulate healing in cases of poor bone repair.
• Close monitoring with repeat imaging to track healing progress.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, adherence to treatment, and any underlying health factors. Most patients with proper care achieve full recovery, but delayed healing may extend recovery time. Follow-up visits are necessary to monitor healing and adjust treatment as needed. Physical therapy is often recommended to restore strength and mobility once healing progresses.

Complications

• Nonunion (failure of the fracture to heal) or malunion (healing in an incorrect position).
• Post-traumatic arthritis due to cartilage damage.
• Chronic pain or stiffness in the knee.
• Infection (rare, but possible with surgical intervention).
• Nerve or blood vessel damage near the fracture site.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.
• Quit smoking, as it impairs healing.
• Use protective gear during sports or activities with knee injury risk.
• Follow rehabilitation guidelines to restore strength and prevent re-injury.

When to Seek Professional Help

Seek immediate care if you experience severe pain, swelling, or inability to bear weight, or if symptoms worsen despite treatment. Contact your provider if you notice increased pain, fever, or signs of infection (e.g., redness, drainage) at the fracture site.

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with delayed healing. Ensure clinical notes specify the fracture type (displaced osteochondral), patella side (unspecified), and healing status (delayed) to support accurate coding. Include details on treatment provided and any imaging or specialist consultations to justify the code assignment.