S82.445P Nondisplaced spiral fracture of shaft of left fibula, subsequent encounter for closed fracture with malunion

Name of the Condition

• Nondisplaced spiral fracture of shaft of left fibula, subsequent encounter for closed fracture with malunion

Summary

A nondisplaced spiral fracture of the left fibula's shaft with malunion is a bone break characterized by a helical pattern along the fibular shaft, where the bone fragments remain in their normal anatomical alignment but have healed in a non-anatomical position. This fracture typically results from twisting forces applied to the leg and may cause persistent pain, limited mobility, or functional impairment due to the malunion. The "subsequent encounter" and "closed fracture with malunion" descriptors indicate this is a follow-up visit for a previously treated fracture that has healed improperly without an open wound.

Causes

Most commonly caused by twisting injuries to the lower leg, such as those sustained during sports, falls, or accidents. High-impact trauma, including direct blows or rotational forces, can also lead to this type of fracture. Malunion may occur if the fracture was not properly aligned during initial treatment or if healing was compromised.

Risk Factors

• Participation in activities with high rotational stress (e.g., skiing, gymnastics).
• Osteoporosis or reduced bone density.
• Previous lower leg injuries or fractures.
• Advanced age, which may weaken bone strength.
• Inadequate immobilization or non-compliance with treatment during initial healing.

Symptoms

• Persistent pain and swelling in the lower leg.
• Bruising and tenderness at the fracture site.
• Inability to bear weight on the affected leg.
• Possible deformity or instability of the leg.
• Limited range of motion or functional impairment.

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and deformity. X-rays are typically used to confirm the fracture's spiral pattern and evaluate the malunion. Additional imaging, such as CT or MRI, may be ordered to assess the extent of malalignment or associated soft tissue damage. Clinical history of prior fracture and healing is also considered.

Treatment Options

Treatment may include pain management, physical therapy to improve function, or orthopedic intervention (e.g., bracing, surgery) to correct malalignment if symptoms are severe. Conservative management is common for mild cases, while surgical correction may be considered for significant functional impairment.

Prognosis and Follow-Up

Prognosis depends on the severity of malunion and associated symptoms. Most patients experience improved function with appropriate treatment, though some may have persistent limitations. Follow-up care focuses on monitoring healing, managing symptoms, and addressing functional deficits.

Complications

• Chronic pain or discomfort.
• Reduced mobility or functional impairment.
• Increased risk of future fractures due to altered bone mechanics.
• Potential need for additional surgical intervention.

Lifestyle & Prevention

• Avoid high-impact or rotational activities until cleared by a healthcare provider.
• Use proper protective equipment during sports or physical activities.
• Maintain bone health through adequate nutrition (e.g., calcium, vitamin D) and exercise.
• Follow post-fracture care instructions to minimize malunion risk.

When to Seek Professional Help

Seek care if symptoms worsen, new pain or swelling develops, or functional impairment persists despite treatment. Immediate attention is needed for signs of infection, severe deformity, or inability to bear weight.

Tips for Medical Coders

Document the presence of malunion and the nature of the encounter (subsequent) to support coding. Ensure clinical notes specify the fracture's status (closed) and any associated symptoms or functional limitations. Verify that the code aligns with the patient's current clinical presentation and treatment phase.