S82.491N Other fracture of shaft of right fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion

Name of the Condition

• Other fracture of shaft of right fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion
• ICD-10 Code: S82.491N

Summary

This condition describes a fracture of the shaft (middle portion) of the right fibula, the smaller bone in the lower leg, classified as an open fracture (type IIIA, IIIB, or IIIC) during a subsequent encounter. The fracture has not healed (nonunion) and requires ongoing management. An open fracture means the bone has broken through the skin, with type IIIA indicating a high-energy wound with adequate soft tissue coverage, type IIIB involving extensive soft tissue loss, and type IIIC including arterial injury requiring repair. The term "other" specifies the fracture type is distinct but not classified under narrower subcategories.

Causes

Most commonly caused by high-force trauma or impact to the right leg, such as from motor vehicle accidents, falls from height, or severe sports injuries. Open fractures with nonunion may result from inadequate initial treatment, infection, or poor blood supply to the fracture site.

Risk Factors

• Severe initial trauma leading to extensive soft tissue damage.
• Infection at the fracture site, which can impede healing.
• Poor blood supply to the fractured bone.
• Smoking or other factors that impair bone healing.
• Advanced age or underlying conditions like diabetes or osteoporosis.

Symptoms

• Persistent pain and swelling in the lower right leg.
• Difficulty bearing weight on the affected leg.
• Visible wound or open skin at the fracture site (may show signs of infection).
• Possible deformity or instability of the leg structure.
• Delayed healing or lack of progress in fracture repair.

Diagnosis

Diagnosis involves a physical examination to assess tenderness, swelling, and wound status. Imaging tests, such as X-rays or CT scans, are used to confirm nonunion and evaluate fracture alignment. Additional tests, like blood work or wound cultures, may be performed to check for infection.

Treatment Options

Treatment focuses on promoting healing and managing the open wound. Options may include surgical intervention (e.g., bone grafting, internal fixation) to stabilize the fracture, wound debridement to remove infected tissue, and antibiotics to treat or prevent infection. Physical therapy may be recommended to restore function once healing progresses.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, presence of infection, and response to treatment. Nonunion fractures may require extended healing time or additional procedures. Regular follow-up with imaging is necessary to monitor progress. Full recovery may take several months, and some patients may experience long-term functional limitations.

Complications

• Chronic pain or instability in the leg.
• Infection at the fracture site.
• Delayed or failed healing (nonunion).
• Nerve or vascular damage from the initial injury.
• Long-term mobility issues or arthritis.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Follow prescribed weight-bearing restrictions to support healing.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.
• Practice proper wound care if an open fracture is present.
• Quit smoking, as it impairs bone healing.

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Increased pain, swelling, or redness around the fracture site.
• Signs of infection (e.g., pus, fever, warmth).
• Numbness, tingling, or loss of circulation in the leg.
• Sudden inability to bear weight on the affected leg.

Tips for Medical Coders

Document the fracture type (IIIA, IIIB, or IIIC) and the presence of nonunion clearly. Note the subsequent encounter status and any surgical or therapeutic interventions performed. Ensure the open fracture classification aligns with clinical documentation to support accurate coding.