S82.024N Nondisplaced longitudinal fracture of right patella, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion

Name of the Condition

• Nondisplaced longitudinal fracture of right patella, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion

Summary

A nondisplaced longitudinal fracture of the right patella is a vertical break in the kneecap that remains in its normal alignment. This type of fracture involves a crack along the bone’s length without shifting of the fragments, preserving knee stability. The severity can range from partial to complete, depending on the extent of the break. This code specifies a subsequent encounter for an open fracture (type IIIA, IIIB, or IIIC) with nonunion, indicating the fracture has not healed properly and the skin was breached during the injury.

Causes

Direct trauma to the knee, such as a fall onto the kneecap, a forceful blow, or a sudden contraction of the quadriceps muscle. High-impact events like sports injuries or motor vehicle accidents are common triggers. The open nature of the fracture (type IIIA, IIIB, or IIIC) indicates significant soft tissue damage, and nonunion suggests the fracture failed to heal after prior treatment.

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.
• Poor blood supply to the patella, which can impede healing.

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.
• Open wound over the kneecap (type IIIA, IIIB, or IIIC).
• Persistent pain or instability indicating nonunion.

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 may be used to assess complex fracture patterns or nonunion. Clinical evaluation of the open wound to determine its severity (type IIIA, IIIB, or IIIC) and documentation of nonunion through imaging or clinical findings.

Treatment Options

• Surgical intervention to stabilize the fracture, such as internal fixation, and address the open wound.
• Antibiotics to prevent or treat infection due to the open fracture.
• Bone grafting or other procedures to promote healing in cases of nonunion.
• Physical therapy to restore knee function and strength.
• Wound care to manage the open fracture and prevent complications.

Prognosis and Follow-Up

Prognosis depends on the severity of the open fracture and the success of treatment for nonunion. Follow-up care is critical to monitor healing, manage complications, and adjust treatment as needed. Regular imaging and clinical assessments help track progress and ensure the fracture heals properly.

Complications

• Infection due to the open fracture.
• Nonunion or delayed healing.
• Arthritis in the knee joint.
• Chronic pain or instability.
• Nerve or blood vessel damage from the injury or surgery.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use protective gear during sports or activities with a risk of knee injury.
• Maintain bone health through a balanced diet and regular exercise.
• Follow post-treatment guidelines to support healing and prevent re-injury.

When to Seek Professional Help

Seek immediate medical attention if you experience severe knee pain, swelling, or an open wound after an injury. Contact your healthcare provider if you notice persistent pain, instability, or signs of infection (e.g., redness, pus) during recovery.

Tips for Medical Coders

Document the fracture type (nondisplaced longitudinal), laterality (right), encounter type (subsequent), open fracture severity (IIIA, IIIB, or IIIC), and nonunion status clearly. Ensure clinical notes support the open fracture classification and nonunion diagnosis to justify the code.