S92.342B Displaced fracture of fourth metatarsal bone, left foot, initial encounter for open fracture

Name of the Condition

• Displaced fracture of fourth metatarsal bone, left foot, initial encounter for open fracture
• ICD-10 code: S92.342B

Summary

A displaced fracture of the fourth metatarsal bone in the left foot, with an open fracture, is a break in the long bone connecting the ankle to the toes where the bone fragments have shifted out of alignment and the skin is breached. This injury typically results from trauma and requires prompt evaluation to assess the fracture pattern, soft tissue damage, and risk of infection.

Causes

Direct trauma to the foot, such as a fall, impact during sports, or a heavy object dropped on the foot, is the most common cause. Open fractures may occur when the force of the injury is severe enough to pierce the skin, exposing the bone to the external environment.

Risk Factors

• Participation in high-impact sports (e.g., soccer, basketball)
• Wearing improper or non-supportive footwear
• Conditions that weaken bones, such as osteoporosis
• Advanced age, which may reduce bone density and balance
• Previous foot injuries or fractures

Symptoms

• Pain and tenderness localized to the outer midfoot
• Swelling and bruising around the affected area
• Difficulty bearing weight or walking on the left foot
• Visible wound or open skin over the fracture site
• Possible deformity if the fracture is severely displaced

Diagnosis

A healthcare provider will perform a physical examination to assess pain, swelling, and range of motion, noting any open wounds or exposed bone. Imaging tests, such as X-rays, are typically used to confirm the fracture and evaluate alignment. Additional imaging, like CT scans, may be ordered if the fracture is complex or involves joint surfaces.

Treatment Options

Treatment focuses on cleaning the wound to prevent infection, stabilizing the fracture (e.g., with casting, splinting, or surgery), and managing pain. Open fractures often require surgical intervention to clean the wound and realign the bone. Antibiotics may be prescribed to reduce infection risk.

Prognosis and Follow-Up

Recovery depends on the severity of the fracture and soft tissue damage. Most patients heal with proper treatment, but open fractures carry a higher risk of complications like infection or delayed healing. Follow-up appointments are necessary to monitor healing and adjust treatment as needed.

Complications

• Infection at the wound site
• Delayed or nonunion of the fracture
• Chronic pain or arthritis in the foot
• Nerve or blood vessel damage
• Difficulty returning to normal activities

Lifestyle & Prevention

• Wear supportive, properly fitting footwear during activities.
• Use protective gear in high-impact sports.
• Maintain bone health through a balanced diet and regular exercise.
• Avoid repetitive stress on the feet, especially if prone to fractures.

When to Seek Professional Help

Seek immediate medical attention if you experience a foot injury with an open wound, severe pain, swelling, or inability to bear weight. Signs of infection, such as increased redness, pus, or fever, also require prompt evaluation.

Tips for Medical Coders

Document the fracture type (displaced), location (fourth metatarsal, left foot), and encounter type (initial for open fracture) clearly. Note the presence of an open wound and any associated complications to ensure accurate coding.