S82.435K Nondisplaced oblique fracture of shaft of left fibula, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Nondisplaced oblique fracture of shaft of left fibula, subsequent encounter for closed fracture with nonunion

Summary

This condition describes a break in the long, thin shaft of the left fibula, one of the two bones in the lower leg. The fracture is oblique (at an angle) and nondisplaced, meaning the bone fragments remain in their normal alignment. It is classified as a closed fracture, with no open wound or communication to the fracture site. The term "subsequent encounter" indicates this is a follow-up visit for an established injury, and "nonunion" signifies that the fracture has failed to heal properly within the expected timeframe.

Causes

Direct trauma to the lower leg, such as from falls, sports injuries, or motor vehicle accidents. Twisting injuries during physical activity can also lead to this type of fracture. Nonunion may result from inadequate immobilization, poor blood supply to the fracture site, infection, or excessive movement during healing.

Risk Factors

• Engaging in high-impact sports or activities.
• Osteoporosis or weakened bone density.
• Previous fractures or bone-related conditions.
• Smoking, which can impair bone healing.
• Certain medical conditions that affect circulation or bone metabolism.

Symptoms

• Persistent pain localized to the lower left leg, often at the fracture site.
• Swelling and bruising around the affected area.
• Difficulty bearing weight on the affected leg.
• Possible tenderness or discomfort during movement.
• No visible deformity, as the fracture remains nondisplaced.

Diagnosis

Physical examination to assess tenderness, swelling, and alignment. Imaging tests, such as X-rays, to confirm the fracture type, location, and lack of displacement. Additional imaging, like CT scans or MRIs, may be used to evaluate for nonunion. Documentation of the fracture as closed and the encounter as subsequent is critical for accurate coding.

Treatment Options

• Immobilization with a cast or brace to stabilize the bone.
• Pain management with medications.
• Surgical intervention, such as bone grafting or internal fixation, to promote healing in cases of nonunion.
• Physical therapy to restore strength and mobility once healing progresses.

Prognosis and Follow-Up

Prognosis depends on the success of treatment for nonunion. With appropriate intervention, healing may still occur, but recovery time is often extended. Regular follow-up appointments are necessary to monitor progress and adjust treatment as needed. Long-term outcomes may include residual pain or limited mobility if healing is incomplete.

Complications

• Chronic pain or discomfort.
• Persistent nonunion requiring additional treatment.
• Limited mobility or functional impairment.
• Increased risk of future fractures in the affected area.

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.
• Use protective equipment during sports or activities with fall risks.
• Follow post-treatment instructions carefully to optimize healing.

When to Seek Professional Help

Seek medical attention if pain worsens, swelling increases, or new symptoms develop, such as numbness, tingling, or difficulty moving the leg. Prompt evaluation is important if nonunion is suspected or if healing does not progress as expected.

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with nonunion. Ensure the code S82.435K is used when the fracture is nondisplaced, oblique, located in the left fibula shaft, and the patient is being seen for follow-up of a closed fracture that has failed to unite. Include details about the nonunion in the clinical notes to support the diagnosis.