S92.352P Displaced fracture of fifth metatarsal bone, left foot, subsequent encounter for fracture with malunion

Name of the Condition

• Technical Term: Displaced fracture of fifth metatarsal bone, left foot, subsequent encounter for fracture with malunion
• Common Name: Broken fifth metatarsal (left foot, malunion)

Summary

A displaced fracture of the fifth metatarsal bone in the left foot with malunion is a break where the bone fragments have shifted out of alignment and healed in a non-anatomical position. This is a subsequent encounter, indicating ongoing care for the fracture. Malunion occurs when the bone heals incorrectly, potentially affecting foot function and stability. The fifth metatarsal is the long bone on the outer edge of the foot, and malunion may require intervention to address functional or structural issues.

Causes

Direct trauma to the foot, such as a fall, twist, or impact, is the primary cause of the initial fracture. Malunion develops if the fracture fragments heal in a displaced position, often due to inadequate immobilization, poor blood supply, or excessive movement during the healing process. Repetitive stress or delayed treatment may also contribute to malunion.

Risk Factors

• Participation in high-impact sports (e.g., 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
• Inadequate immobilization or non-compliance with treatment plans

Symptoms

• Persistent pain or discomfort on the outer edge of the left foot
• Swelling or bruising in the affected area
• Difficulty bearing weight on the left foot
• Altered gait or foot alignment
• Possible deformity or prominence over the fracture site

Diagnosis

A healthcare provider will perform a physical examination to assess foot alignment, tenderness, and range of motion. Imaging studies, such as X-rays, are used to confirm malunion by evaluating bone healing and displacement. Additional tests, like CT scans, may be ordered to assess the extent of malalignment or associated complications.

Treatment Options

Treatment depends on the severity of malunion and functional impact. Conservative options include pain management, physical therapy, and orthotic devices to improve stability. Surgical intervention, such as osteotomy or bone grafting, may be considered for significant malunion affecting mobility or causing chronic pain.

Prognosis and Follow-Up

Prognosis varies based on the degree of malunion and treatment response. Most patients experience improved function with appropriate management, though some may have residual symptoms. Regular follow-up appointments are necessary to monitor healing, adjust treatment, and address any complications. Long-term outcomes depend on adherence to rehabilitation and activity modifications.

Complications

• Chronic pain or discomfort
• Altered gait or foot mechanics
• Increased risk of future fractures
• Nerve or soft tissue irritation
• Reduced mobility or activity limitations

Lifestyle & Prevention

• Wear supportive, well-fitting footwear to reduce stress on the foot.
• Avoid high-impact activities that strain the foot until cleared by a provider.
• Engage in low-impact exercises, such as swimming or cycling, to maintain fitness.
• Follow rehabilitation guidelines to strengthen foot muscles and improve alignment.
• Address underlying bone health issues, such as osteoporosis, to reduce fracture risk.

When to Seek Professional Help

Seek medical attention if you experience worsening pain, swelling, or difficulty bearing weight on the left foot. Consult a provider if you notice changes in foot shape, persistent instability, or signs of infection (e.g., redness, warmth, or drainage) at the fracture site.

Tips for Medical Coders

This code represents a subsequent encounter for a displaced fracture of the fifth metatarsal bone in the left foot with malunion. Document the encounter type (subsequent) and confirm the presence of malunion, as this distinguishes it from acute or healing fractures. Ensure clinical documentation supports the malunion diagnosis and subsequent care to justify code assignment.