S92.354P Nondisplaced fracture of fifth metatarsal bone, right foot, subsequent encounter for fracture with malunion

Name of the Condition

• Technical Term: Nondisplaced fracture of fifth metatarsal bone, right foot, subsequent encounter for fracture with malunion
• ICD-10 Code: S92.354P
• Common Name: Broken fifth metatarsal (right foot, malunion)

Summary

A nondisplaced fracture of the fifth metatarsal bone in the right foot, with malunion, is a break where the bone fragments remain in their normal alignment but heal in an abnormal position. This occurs during a subsequent encounter (follow-up visit) for a fracture that has not healed properly. The fifth metatarsal is the long bone on the outer edge of the foot, and malunion may result in altered biomechanics or persistent symptoms.

Causes

Direct trauma to the right foot, such as a fall or twist, is the primary cause. Malunion develops when the fracture heals in a misaligned position, often due to inadequate immobilization, poor blood supply, or delayed treatment. Repetitive stress or high-impact activities may also contribute to malunion over time.

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

Symptoms

• Persistent pain and tenderness on the outer edge of the right foot
• Swelling or bruising in the affected area
• Difficulty bearing weight or walking
• Possible deformity or altered gait due to malunion

Diagnosis

A healthcare provider will perform a physical examination to assess pain, swelling, and range of motion. Imaging tests, such as X-rays, are used to confirm malunion by showing abnormal bone alignment. The provider will also evaluate functional limitations and compare current imaging with prior records to document healing progress.

Treatment Options

Treatment may include pain management, physical therapy to improve mobility, or orthotics to support the foot. In some cases, surgery may be necessary to realign the bone. The approach depends on the severity of malunion and the patient’s symptoms.

Prognosis and Follow-Up

Prognosis varies based on the degree of malunion and functional impact. Follow-up care focuses on monitoring healing, managing symptoms, and restoring function. Regular imaging and clinical assessments help track progress and adjust treatment as needed.

Complications

• Chronic pain or discomfort
• Altered gait or balance issues
• Increased risk of future fractures
• Potential need for surgical intervention

Lifestyle & Prevention

• Wear supportive footwear to reduce stress on the foot.
• Avoid high-impact activities that strain the metatarsal.
• Maintain bone health through proper nutrition and exercise.
• Seek prompt treatment for foot injuries to minimize malunion risk.

When to Seek Professional Help

Consult a healthcare provider if you experience persistent pain, swelling, or difficulty walking after a foot injury. Early evaluation can help address malunion and prevent long-term complications.

Tips for Medical Coders

Document the subsequent encounter for fracture with malunion clearly, including clinical notes on malunion confirmation (e.g., imaging findings) and the impact on function. Ensure the code S92.354P is used only when the fracture is nondisplaced, involves the right foot, and is a subsequent encounter with malunion.