S92.312A Displaced fracture of first metatarsal bone, left foot, initial encounter for closed fracture

Name of the Condition

• Displaced fracture of first metatarsal bone, left foot, initial encounter for closed fracture
• ICD-10 Code: S92.312A

Summary

This condition involves a break in the first metatarsal bone of the left foot, where the bone fragments are displaced from their normal alignment. It is classified as a closed fracture, meaning the skin remains intact, and it represents an initial encounter, indicating the first time the fracture is being treated. The first metatarsal is a critical weight-bearing bone in the foot, and displacement can affect mobility and stability.

Causes

Direct trauma or impact to the left foot is the primary cause, such as dropping a heavy object, a sports injury, or a fall. Twisting the foot forcefully or sudden, severe pressure on the bone can also lead to this type of fracture.

Risk Factors

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

Symptoms

• Intense pain at the site of injury
• Swelling and bruising around the affected area
• Difficulty bearing weight on the left foot
• Possible visible deformity if the fracture is severely displaced

Diagnosis

A healthcare provider will conduct a physical examination to assess pain, swelling, and range of motion. Imaging studies, such as X-rays, are typically used to confirm the fracture and evaluate the degree of displacement. The provider will also determine if the fracture is closed (skin intact) and document the encounter as initial.

Treatment Options

Treatment depends on the severity of the displacement and may include immobilization with a cast or boot to allow healing. Pain management and rest are standard. Severe displacement may require realignment (reduction) or surgical intervention. Physical therapy may be recommended during recovery to restore strength and mobility.

Prognosis and Follow-Up

Most displaced fractures of the first metatarsal heal with proper treatment, though recovery time varies. Follow-up appointments are necessary to monitor healing and adjust treatment as needed. Full weight-bearing may be delayed until the bone is stable, and rehabilitation may be required to regain function.

Complications

Potential complications include nonunion (failure to heal), malunion (healing in improper alignment), chronic pain, or arthritis in the joint. Infection is rare with closed fractures but may occur if the skin is compromised. Nerve or blood vessel damage is also possible in severe cases.

Lifestyle & Prevention

Wearing supportive footwear, especially during high-impact activities, can reduce risk. Maintaining bone health through proper nutrition (e.g., calcium, vitamin D) and avoiding repetitive stress on the foot may help prevent fractures. Gradual conditioning and proper technique in sports can minimize trauma.

When to Seek Professional Help

Seek immediate medical attention if there is severe pain, inability to bear weight, visible deformity, or signs of infection (e.g., redness, pus). Delayed treatment may worsen displacement or lead to complications.

Tips for Medical Coders

Document the fracture as displaced, specify the left foot, and confirm it is a closed fracture with an initial encounter. Ensure clinical documentation supports the displacement and absence of skin penetration. The code S92.312A requires clear notation of the fracture type, location, and encounter stage for accurate assignment.