S92.331K Displaced fracture of third metatarsal bone, right foot, subsequent encounter for fracture with nonunion

Name of the Condition

• Displaced fracture of third metatarsal bone, right foot, subsequent encounter for fracture with nonunion.

Summary

This condition describes a break in the third metatarsal bone of the right foot where the bone fragments are out of alignment, and the fracture has failed to heal properly (nonunion). The term "subsequent encounter" indicates this is a follow-up visit for the fracture, occurring after the initial treatment phase. Nonunion means the bone has not fused within the expected timeframe, requiring further evaluation and management.

Causes

The fracture may have resulted from initial trauma, such as a fall or injury, and nonunion can develop due to inadequate immobilization, poor blood supply to the bone, infection, or underlying health conditions that impair healing. Persistent movement at the fracture site or insufficient treatment during the initial phase may also contribute to nonunion.

Risk Factors

• Poor blood circulation or vascular conditions affecting the foot.
• Smoking, which can hinder bone healing.
• Nutritional deficiencies, such as low calcium or vitamin D.
• Chronic conditions like diabetes or osteoporosis that weaken bone integrity.
• Previous surgeries or interventions at the fracture site.

Symptoms

• Persistent pain at the fracture site, even after initial treatment.
• Swelling or tenderness that does not improve over time.
• Difficulty bearing weight on the right foot.
• Visible or palpable gap at the fracture site if displacement is severe.
• Limited range of motion in the midfoot.

Diagnosis

A healthcare provider will review the patient’s history and perform a physical exam to assess pain, swelling, and mobility. Imaging, such as X-rays or CT scans, is used to confirm nonunion by showing a persistent gap between bone fragments or lack of healing progress. Additional tests may evaluate blood flow or bone density if underlying conditions are suspected.

Treatment Options

Treatment focuses on promoting bone healing and may include immobilization with a cast or brace, bone grafting to stimulate fusion, or surgical intervention to realign and stabilize the fracture. Physical therapy may be recommended to restore strength and function once healing progresses.

Prognosis and Follow-Up

Prognosis depends on the severity of nonunion and response to treatment. Regular follow-up visits and imaging are typically required to monitor healing. Full recovery may take longer than with a properly healing fracture, and some patients may experience residual pain or mobility limitations.

Complications

• Chronic pain or discomfort in the foot.
• Persistent nonunion requiring additional interventions.
• Arthritis or joint damage due to misalignment.
• Infection, particularly if surgical treatment is needed.
• Reduced mobility or difficulty with daily activities.

Lifestyle & Prevention

• Avoid high-impact activities until the fracture is fully healed.
• Wear supportive footwear to reduce stress on the foot.
• Maintain a balanced diet rich in calcium and vitamin D to support bone health.
• Follow post-treatment instructions carefully to minimize movement at the fracture site.
• Address underlying health conditions that may affect healing, such as diabetes.

When to Seek Professional Help

Seek care if pain worsens, swelling increases, or there are signs of infection (e.g., redness, fever). Persistent difficulty bearing weight or lack of improvement after treatment also warrants medical evaluation.

Tips for Medical Coders

Document the encounter as a subsequent visit for fracture with nonunion, ensuring the record specifies the fracture’s failure to heal. Include details on prior treatments, imaging results, and clinical findings supporting nonunion. The code S92.331K requires clear documentation of the nonunion status and the fracture’s location (right foot, third metatarsal) to justify the diagnosis.