S82.426K Nondisplaced transverse fracture of shaft of unspecified fibula, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Nondisplaced transverse fracture of shaft of unspecified fibula, subsequent encounter for closed fracture with nonunion
• ICD-10 Code: S82.426K

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 closed (no open wound). This code represents a subsequent encounter for treatment, indicating the fracture has not healed properly (nonunion) and requires ongoing management.

Causes

Most commonly caused by direct trauma or impact to the leg, such as from falls, sports injuries, or motor vehicle accidents. High-force impacts or twisting motions can also lead to this type of fracture. Nonunion may result from inadequate initial treatment, poor blood supply to the bone, infection, or excessive movement at the fracture site during 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 healing.
• Certain medical conditions (e.g., diabetes) that affect bone repair.

Symptoms

• Persistent pain and swelling in the lower leg, often lasting beyond the typical healing period.
• Difficulty bearing weight on the affected leg.
• Bruising or tenderness around the injured area.
• Possible instability or deformity of the leg structure.
• Lack of improvement in symptoms despite prior treatment.

Diagnosis

Diagnosis involves a physical examination by a healthcare professional to assess tenderness, swelling, and deformity. Imaging tests, such as X-rays or CT scans, are typically used to confirm the fracture and evaluate for nonunion. Additional tests, like bone scans or MRI, may be performed to assess blood flow and tissue viability around the fracture site.

Treatment Options

Treatment focuses on promoting bone healing and may include immobilization with a cast or brace, surgical intervention (e.g., bone grafting or internal fixation), or physical therapy to restore function. Pain management and activity modification are also important components of care.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the effectiveness of treatment. Regular follow-up appointments are necessary to monitor healing progress, adjust treatment plans, and address any complications. Full recovery may take several months, and some patients may experience long-term functional limitations.

Complications

• Delayed or failed healing (nonunion).
• Infection, particularly if surgery is required.
• Chronic pain or instability.
• Nerve or blood vessel damage.
• Post-traumatic arthritis in the surrounding joints.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Maintain a balanced diet rich in calcium and vitamin D to support bone health.
• Quit smoking, as it impairs healing.
• Use protective equipment during sports or activities with fall risks.
• Follow rehabilitation guidelines to strengthen the leg and prevent re-injury.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or deformity, or if symptoms worsen despite treatment. Contact your healthcare provider if you notice signs of infection (e.g., fever, redness, or drainage) or if you are unable to bear weight on the affected leg.

Tips for Medical Coders

This code is used for a subsequent encounter for a closed fracture with nonunion. Document the fracture type (nondisplaced transverse), location (shaft of unspecified fibula), and the presence of nonunion. Ensure the encounter is classified as "subsequent" and the fracture is documented as closed. Include details about treatment provided and any imaging or clinical findings that support the nonunion diagnosis.