S92.345 Nondisplaced fracture of fourth metatarsal bone, left foot

Name of the Condition

• Nondisplaced fracture of fourth metatarsal bone, left foot
• ICD-10 code: S92.345

Summary

A nondisplaced fracture of the fourth metatarsal bone in the left foot is a break in the long bone of the forefoot where the bone fragments remain in their normal alignment. This injury typically results from trauma or repetitive stress and may vary in severity, depending on the force of impact and the stability of the fracture.

Causes

Direct trauma to the foot, such as a fall, impact during sports, or a heavy object dropped on the foot, is a common cause. Stress fractures may also occur from overuse, particularly in activities involving repetitive weight-bearing or sudden increases in physical activity.

Risk Factors

• Participation in high-impact sports (e.g., running, basketball, soccer)
• 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 localized to the outer midfoot area of the left foot
• Swelling and bruising around the affected bone
• Difficulty bearing weight or walking on the left foot
• Possible mild deformity if the fracture is displaced (though nondisplaced fractures typically do not show visible deformity)

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. Additional imaging, like MRI or CT scans, may be ordered if a stress fracture is suspected or if the X-ray results are inconclusive.

Treatment Options

Treatment depends on the severity of the fracture and may include rest, ice, compression, and elevation (RICE) to reduce swelling. Immobilization with a cast, boot, or brace may be recommended to protect the bone during healing. Pain management with over-the-counter or prescription medications may be used as needed. Physical therapy is often prescribed to restore strength and mobility once the fracture has healed.

Prognosis and Follow-Up

Most nondisplaced fractures of the fourth metatarsal bone heal well with proper treatment and rest. Recovery time typically ranges from 4 to 6 weeks, depending on the individual and the extent of the injury. Follow-up appointments with a healthcare provider are important to monitor healing and adjust treatment as needed. Return to normal activities, including sports, should be gradual to avoid re-injury.

Complications

While rare, complications can include delayed healing, nonunion (failure of the bone to heal), or malunion (healing in an abnormal position). Infection may occur if the fracture is open (exposed to the outside). Chronic pain or arthritis in the foot may develop if the fracture is not properly treated.

Lifestyle & Prevention

Wearing supportive footwear and avoiding activities that place excessive stress on the feet can help prevent fractures. Maintaining a healthy diet rich in calcium and vitamin D supports bone strength. Gradually increasing physical activity and using proper technique during exercise reduces the risk of overuse injuries. Regular foot check-ups are recommended for individuals with conditions that weaken bones.

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, warmth, pus) around the injury. Persistent pain, swelling, or difficulty walking after an injury should also prompt a visit to a healthcare provider.

Tips for Medical Coders

When coding for a nondisplaced fracture of the fourth metatarsal bone, left foot, use ICD-10 code S92.345. Ensure documentation specifies the bone (fourth metatarsal), the side (left foot), and the fracture type (nondisplaced) to support accurate coding. Include details about the mechanism of injury, symptoms, and diagnostic findings to justify the code selection. Avoid using this code for displaced fractures or fractures of other metatarsal bones.