S92.313B Displaced fracture of first metatarsal bone, unspecified foot, initial encounter for open fracture

Name of the Condition

• Displaced fracture of first metatarsal bone, unspecified foot, initial encounter for open fracture
• ICD-10 Code: S92.313B

Summary

This condition describes a break in the first metatarsal bone of the foot, where the bone fragments are displaced from their normal position and the skin is breached (open fracture). The term "unspecified foot" indicates the affected side is not documented, and "initial encounter" denotes this is the first presentation of the injury. Open fractures carry a higher risk of infection due to exposure of the bone to the external environment.

Causes

Direct trauma or high-impact force to the foot is the primary cause. Common scenarios include falls, sports injuries, or crushing injuries that break the skin and displace the bone. The open nature of the fracture occurs when the bone pierces the skin or the injury creates an external wound.

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

• Intense pain at the injury site
• Swelling, bruising, and visible wound or open skin
• Difficulty bearing weight on the affected foot
• Possible deformity if the fracture is severely displaced

Diagnosis

A healthcare provider will perform a physical examination to assess pain, swelling, and wound characteristics. Imaging tests, such as X-rays, are used to determine the fracture pattern and displacement. The open wound is evaluated for contamination or infection risk.

Treatment Options

• Wound cleaning and debridement to reduce infection risk
• Antibiotics to prevent or treat infection
• Immobilization with casting or splinting
• Surgical intervention to realign and stabilize the bone, if necessary
• Pain management and follow-up care

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, wound contamination, and treatment response. Open fractures require close monitoring for infection. Follow-up appointments are necessary to assess healing, adjust treatment, and guide rehabilitation.

Complications

• Infection of the bone (osteomyelitis) or soft tissues
• Delayed healing or nonunion
• Chronic pain or arthritis
• Nerve or blood vessel damage
• Long-term mobility issues

Lifestyle & Prevention

• Wear supportive, properly fitted footwear during activities
• Use protective gear in high-risk sports
• Maintain bone health through diet and exercise
• Address fall risks, especially in older adults
• Seek prompt treatment for foot injuries to prevent complications

When to Seek Professional Help

• Severe pain, swelling, or deformity after a foot injury
• Open wound or bleeding from the foot
• Inability to bear weight or walk
• Signs of infection, such as redness, pus, or fever
• Worsening symptoms despite initial care

Tips for Medical Coders

Document the open fracture status and initial encounter clearly. Specify if the foot (right/left/unspecified) is documented, as this impacts coding. Ensure wound characteristics and treatment align with the open fracture definition. Code S92.313B is used for the initial encounter of a displaced first metatarsal fracture with an open wound, unspecified foot.