S82.426N Nondisplaced transverse fracture of shaft of unspecified fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion

Name of the Condition

• Nondisplaced transverse fracture of shaft of unspecified fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion
• ICD-10 Code: S82.426N

Summary

A nondisplaced transverse fracture of the shaft of the unspecified fibula is a break in the long, thin bone on the lateral side of the lower leg, where the fracture line runs horizontally across the middle portion of the bone. The bone fragments remain in their normal anatomical alignment, and the fracture is classified as open (type IIIA, IIIB, or IIIC) with nonunion, indicating the bone has failed to heal properly after an initial injury. This is a subsequent encounter for treatment.

Causes

Most commonly caused by direct trauma or high-impact forces to the leg, such as falls, sports injuries, or motor vehicle accidents. Open fractures may result from the same mechanisms, with the force sufficient to break the skin and expose the fracture site. Nonunion can occur due to inadequate immobilization, poor blood supply, infection, or other factors that impede healing.

Risk Factors

• Participation in contact sports or high-impact activities.
• Osteoporosis or reduced bone density, which increases fragility.
• Advanced age, which may weaken bone strength.
• Previous leg injuries or surgeries.
• Smoking or poor nutrition, which can impair bone healing.
• Infection at the fracture site.

Symptoms

• Persistent pain and swelling in the lower leg.
• Difficulty bearing weight on the affected leg.
• Bruising or tenderness around the injured area.
• Possible deformity or instability of the leg structure.
• Open wound or exposed bone (if applicable).
• Signs of nonunion, such as lack of healing progress over time.

Diagnosis

Diagnosis involves a physical examination by a healthcare professional to assess tenderness, swelling, and deformity. Imaging tests, such as X-rays, are typically used to confirm the fracture and determine its extent. Additional tests, like CT scans or MRIs, may be performed to evaluate nonunion or soft tissue damage. Documentation should specify the open fracture type (IIIA, IIIB, or IIIC) and the presence of nonunion.

Treatment Options

Treatment may include surgical intervention to stabilize the fracture, such as internal or external fixation, and addressing any infection or soft tissue damage. Nonunion may require bone grafting or other procedures to promote healing. Physical therapy is often recommended to restore function and strength. Antibiotics or other medications may be used to manage infection.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, the success of treatment, and the patient’s overall health. Nonunion and open fractures may require extended recovery periods. Regular follow-up appointments are necessary to monitor healing and adjust treatment as needed. Complications, such as infection or chronic pain, may affect long-term outcomes.

Complications

• Infection at the fracture site.
• Chronic pain or instability.
• Delayed or failed healing (nonunion).
• Nerve or blood vessel damage.
• Post-traumatic arthritis.
• Limited mobility or functional impairment.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Follow prescribed weight-bearing restrictions.
• Maintain a balanced diet rich in calcium and vitamin D to support bone health.
• Quit smoking, as it can impair healing.
• Use protective equipment during sports or activities with a risk of injury.
• Attend all follow-up appointments to monitor progress.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or an open wound at the fracture site. Contact your healthcare provider if you notice signs of infection, such as redness, warmth, or pus, or if pain worsens despite treatment. Follow up regularly to ensure proper healing and address any concerns.

Tips for Medical Coders

Document the fracture type (IIIA, IIIB, or IIIC) and the presence of nonunion clearly. Ensure the encounter is coded as subsequent, reflecting ongoing treatment for a nonhealing fracture. Verify that the fibula is unspecified (not identified as right or left) and that the fracture is transverse and nondisplaced. Include details about any surgical interventions or complications to support accurate coding.