S82.874N Nondisplaced pilon fracture of right tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion

Name of the Condition

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

Summary

A nondisplaced pilon fracture of the right tibia is a break in the distal (lower) end of the tibia, near the ankle joint, where bone fragments remain in their normal alignment. This injury affects the weight-bearing surface of the tibia and is classified as an open fracture type IIIA, IIIB, or IIIC, indicating significant soft tissue damage. The fracture has not healed (nonunion) and this is a subsequent encounter for treatment, meaning the patient is receiving ongoing care for the established condition.

Causes

Pilon fractures commonly result from axial loading forces, such as falls from a height or motor vehicle accidents, where the talus (ankle bone) is driven into the tibial plafond. Direct impacts to the ankle or rotational forces may also contribute to this type of fracture. Open fractures occur when the trauma causes a break in the skin, exposing the fracture site. Nonunion may develop due to inadequate initial stabilization, poor blood supply, infection, or other factors that impede healing.

Risk Factors

• High-impact trauma, such as falls or vehicular collisions.
• Participation in activities with a high risk of ankle injury.
• Osteoporosis or other bone-weakening conditions.
• Previous ankle or lower leg injuries.
• Poorly managed initial fracture or infection.

Symptoms

• Intense pain and swelling around the ankle.
• Inability to bear weight on the affected leg.
• Visible wound or soft tissue damage (from open fracture).
• Persistent pain or instability indicating nonunion.
• Possible deformity or misalignment (if displacement occurs later).

Diagnosis

Diagnosis involves a thorough clinical evaluation, including assessment of the open wound and fracture site. Imaging studies, such as X-rays or CT scans, are used to confirm the fracture type, assess alignment, and evaluate for nonunion. The classification of the open fracture (IIIA, IIIB, or IIIC) is determined by the extent of soft tissue damage, contamination, and vascular injury. Additional tests may be performed to rule out infection or assess bone healing.

Treatment Options

Treatment focuses on addressing the open fracture and promoting union of the nonhealing bone. This may include surgical intervention to clean the wound, stabilize the fracture (e.g., with plates, screws, or external fixation), and address soft tissue damage. Antibiotics are often prescribed to prevent or treat infection. Follow-up care involves monitoring healing, managing pain, and potentially additional procedures to enhance bone union.

Prognosis and Follow-Up

Prognosis depends on the severity of the initial injury, the success of treatment, and the patient’s overall health. Nonunion and open fractures increase the risk of complications, such as infection or chronic pain. Long-term follow-up is necessary to monitor healing, functional recovery, and address any ongoing issues. Physical therapy may be recommended to restore mobility and strength.

Complications

• Infection at the fracture site or wound.
• Delayed or failed bone healing (nonunion).
• Chronic pain or arthritis in the ankle.
• Nerve or vascular damage.
• Limited mobility or functional impairment.

Lifestyle & Prevention

• Avoid high-risk activities that may lead to trauma.
• Use protective gear during sports or work.
• Maintain bone health through proper nutrition and exercise.
• Follow post-treatment instructions to support healing.
• Attend all follow-up appointments to monitor progress.

When to Seek Professional Help

Seek immediate medical attention if you experience severe ankle pain, swelling, or an open wound after injury. Contact your healthcare provider if you have persistent pain, difficulty bearing weight, or signs of infection (e.g., redness, warmth, or drainage) during recovery.

Tips for Medical Coders

Document the encounter as a subsequent visit for an established open fracture (type IIIA, IIIB, or IIIC) with confirmed nonunion. Ensure the code S82.874N is used only when the fracture is nondisplaced, the open fracture type is specified, and nonunion is present. Include details on the fracture’s location (right tibia), type of encounter (subsequent), and any relevant clinical findings to support the diagnosis.