S92.343 Displaced fracture of fourth metatarsal bone, unspecified foot

Name of the Condition

• Displaced fracture of fourth metatarsal bone, unspecified foot
• ICD-10 code: S92.343

Summary

A displaced fracture of the fourth metatarsal bone in the unspecified foot is a break in the long bone connecting the ankle to the toes, where the bone fragments have shifted out of their normal alignment. This injury typically results from trauma or repetitive stress and requires evaluation to determine the extent of displacement and appropriate management.

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. Repetitive stress from activities like running or jumping can also lead to stress fractures over time.

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 foot
• Possible visible deformity if the fracture is severely displaced

Diagnosis

A healthcare provider will perform a physical examination to assess pain, swelling, and range of motion. Imaging tests, such as X-rays, are typically used to confirm the fracture and evaluate alignment.

Treatment Options

Treatment depends on the severity of displacement and may include immobilization with a cast or boot, pain management, and activity modification. Severe cases may require surgical intervention to realign the bone fragments.

Prognosis and Follow-Up

Most displaced fractures heal with proper treatment, but recovery time varies. Follow-up care is essential to monitor healing and adjust treatment as needed. Physical therapy may be recommended to restore strength and mobility.

Complications

Potential complications include nonunion (failure to heal), malunion (improper healing), chronic pain, or arthritis in the affected joint. Infection or nerve damage may occur in severe cases.

Lifestyle & Prevention

Wearing supportive footwear, avoiding excessive repetitive stress, and maintaining bone health through proper nutrition can help reduce risk. Gradual increases in physical activity and protective gear during sports may also prevent injuries.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, inability to bear weight, visible deformity, or signs of infection (e.g., redness, fever). Persistent pain or swelling after an injury should also prompt evaluation.

Tips for Medical Coders

Document the specific foot (right/left) if known, as this affects code assignment. For unspecified foot, use S92.343. Ensure clinical documentation supports displacement and specifies the fourth metatarsal bone to justify the code.