S82.462M Displaced segmental fracture of shaft of left fibula, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

• Displaced segmental fracture of shaft of left fibula, subsequent encounter for open fracture type I or II with nonunion
• ICD-10 Code: S82.462M

Summary

A displaced segmental fracture of the shaft of the left fibula is a break in the long, thin bone on the lateral side of the lower leg, where the bone is broken into two or more separate pieces and the fragments are out of alignment. This injury involves the middle portion of the fibula and is classified as an open fracture (type I or II), meaning the skin is broken but the wound is relatively small and clean. The term "subsequent encounter" indicates this is a follow-up visit for the fracture, and "nonunion" refers to the failure of the bone to heal properly after an extended period.

Causes

Most commonly caused by high-energy trauma, such as motor vehicle accidents, falls from significant height, or direct impact to the leg. Twisting injuries or severe rotational forces can also lead to this type of fracture. Nonunion may result from inadequate immobilization, poor blood supply to the bone, infection, or excessive movement at the fracture site during healing.

Risk Factors

• Participation in high-impact sports or activities with risk of falls.
• Osteoporosis or reduced bone density, which increases fragility.
• Advanced age, which may weaken bone strength.
• Previous leg injuries or surgeries that compromise bone integrity.
• Smoking or poor nutrition, which can impair bone healing.

Symptoms

• Persistent pain and swelling in the lower leg, even after initial treatment.
• Difficulty bearing weight on the affected leg.
• Bruising or tenderness around the injured area.
• Possible deformity or instability of the leg structure.
• Visible signs of nonunion, such as a gap or misalignment in the bone on imaging.

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, evaluate alignment, and assess for nonunion. Additional tests, like blood work, may be performed to rule out infection or nutritional deficiencies affecting healing.

Treatment Options

Treatment for nonunion may include surgical intervention, such as bone grafting, internal fixation with plates or screws, or external fixation to stabilize the fracture. Physical therapy is often recommended to restore strength and mobility. In some cases, electrical stimulation or ultrasound therapy may be used to promote bone healing. Pain management and addressing underlying risk factors, such as smoking cessation or nutritional support, are also important.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion, the patient’s overall health, and adherence to treatment. With proper intervention, many patients achieve successful bone healing and return to normal function. Follow-up visits are necessary to monitor progress, assess healing, and adjust treatment as needed. Long-term follow-up may be required to ensure the fracture site remains stable.

Complications

• Chronic pain or discomfort.
• Persistent instability or deformity of the leg.
• Infection at the fracture site.
• Nerve or blood vessel damage.
• Limited mobility or functional impairment.

Lifestyle & Prevention

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

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Severe or worsening pain.
• Increased swelling, redness, or drainage from the injury site.
• Signs of infection, such as fever or chills.
• Sudden inability to bear weight on the leg.
• New or worsening deformity.

Tips for Medical Coders

When coding S82.462M, ensure documentation specifies the fracture as displaced, segmental, and involving the shaft of the left fibula. Note the open fracture type (I or II) and the presence of nonunion. The "subsequent encounter" modifier indicates this is a follow-up visit, not the initial treatment. Verify that the encounter aligns with the healing timeline and that nonunion is clearly documented to support the code.