S92.355P Nondisplaced fracture of fifth metatarsal bone, left foot, subsequent encounter for fracture with malunion

Name of the Condition

• Technical Term: Nondisplaced fracture of fifth metatarsal bone, left foot, subsequent encounter for fracture with malunion
• Common Name: Malunion of the left fifth metatarsal (nondisplaced fracture)

Summary

A nondisplaced fracture of the fifth metatarsal bone in the left foot is a break where the bone fragments remain in their normal alignment. This subsequent encounter indicates the fracture has healed with malunion, meaning the bone has united in a non-anatomical position. The condition requires evaluation to assess functional impact and guide management.

Causes

Direct trauma to the foot, such as a fall or twist, is the primary cause. Malunion may occur if the fracture was not properly immobilized or if healing was incomplete during initial treatment.

Risk Factors

• Inadequate immobilization or non-compliance with initial treatment
• Delayed or incomplete healing of the original fracture
• Underlying bone conditions affecting healing (e.g., osteoporosis)
• High-impact activities resuming too soon after injury

Symptoms

• Persistent pain or discomfort on the outer edge of the left foot
• Altered gait or difficulty bearing weight
• Visible or palpable deformity at the fracture site
• Stiffness or reduced range of motion in the foot

Diagnosis

A healthcare provider will assess pain, swelling, and functional limitations. Imaging tests, such as X-rays, are used to confirm malunion and evaluate bone alignment. Comparison with prior imaging may help determine the extent of healing deviation.

Treatment Options

• Orthotic devices or supportive footwear to improve comfort and function
• Physical therapy to strengthen surrounding muscles and improve mobility
• Pain management with medications or modalities
• Surgical intervention (e.g., osteotomy) if malunion causes significant functional impairment

Prognosis and Follow-Up

Most patients experience improved symptoms with conservative management, though residual discomfort may persist. Follow-up imaging and clinical assessments monitor healing and functional outcomes. Long-term prognosis depends on the severity of malunion and response to treatment.

Complications

• Chronic pain or discomfort
• Altered biomechanics leading to secondary issues (e.g., arthritis)
• Increased risk of re-injury due to structural weakness
• Persistent gait abnormalities affecting mobility

Lifestyle & Prevention

• Wear supportive footwear to reduce stress on the foot
• Avoid high-impact activities until cleared by a healthcare provider
• Engage in gradual rehabilitation to restore strength and flexibility
• Maintain bone health through proper nutrition and exercise

When to Seek Professional Help

Seek care if pain worsens, swelling increases, or mobility declines significantly. Prompt evaluation is necessary if new deformity or instability develops, as these may indicate complications requiring intervention.

Tips for Medical Coders

Document the presence of malunion and specify the subsequent encounter status. Include details on functional impact, treatment provided, and any imaging findings to support code assignment. Ensure documentation aligns with the clinical scenario of a healed fracture with non-anatomical union.