S92.326K Nondisplaced fracture of second metatarsal bone, unspecified foot, subsequent encounter for fracture with nonunion

Name of the Condition

• Technical Term: Nondisplaced fracture of second metatarsal bone, unspecified foot, subsequent encounter for fracture with nonunion
• ICD-10 Code: S92.326K
• Common Name: Broken second metatarsal (unspecified foot), nonunion, subsequent encounter

Summary

A nondisplaced fracture of the second metatarsal bone in the unspecified foot is a break in the long bone of the midfoot where the bone fragments remain aligned. This code represents a subsequent encounter for a fracture that has failed to heal properly (nonunion). The second metatarsal is a weight-bearing bone, and nonunion may occur due to inadequate stabilization, poor blood supply, or other factors. Management focuses on promoting healing, stabilizing the bone, and addressing underlying issues to restore function.

Causes

Direct trauma to the foot, such as a fall, sports injury, or crush injury, is the most common cause. Nonunion may result from insufficient immobilization, poor blood flow to the fracture site, infection, or excessive movement during healing. Repetitive stress or inadequate treatment of the initial fracture can also contribute to delayed or failed healing.

Risk Factors

• Participation in high-impact sports or activities
• Wearing improper or non-supportive footwear
• Conditions that weaken bones, such as osteoporosis or diabetes
• Advanced age, which may reduce bone density and healing capacity
• Smoking or poor nutrition, which can impair bone healing
• Previous foot injuries or fractures

Symptoms

• Persistent pain at the fracture site, even after initial healing
• Swelling or tenderness that does not resolve
• Limited mobility or difficulty bearing weight on the foot
• Visible deformity or instability in the foot
• Possible clicking or grinding sensations with movement

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and mobility. Imaging studies, such as X-rays or CT scans, are used to confirm nonunion by showing a persistent gap or lack of bone healing at the fracture site. Additional tests may evaluate blood flow or rule out infection. The clinician will also review the patient's history of the initial injury and treatment.

Treatment Options

Treatment depends on the severity of nonunion and may include immobilization with a cast or brace, surgical intervention to stabilize the bone (e.g., internal fixation), bone grafting to promote healing, or physical therapy to restore function. Pain management and addressing underlying risk factors (e.g., smoking cessation) are also important.

Prognosis and Follow-Up

Prognosis varies based on the cause of nonunion and the effectiveness of treatment. With proper management, many patients achieve healing and restored function, but some may experience chronic pain or mobility issues. Regular follow-up with imaging is typically recommended to monitor progress and adjust treatment as needed.

Complications

• Chronic pain or discomfort
• Persistent nonunion requiring additional intervention
• Arthritis or joint damage due to instability
• Infection, particularly if surgery is performed
• Reduced mobility or difficulty with weight-bearing activities

Lifestyle & Prevention

• Wear supportive, properly fitting footwear to reduce stress on the foot.
• Avoid high-impact activities until cleared by a healthcare provider.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.
• Quit smoking, as it impairs bone healing.
• Follow post-injury care instructions carefully to promote proper healing.

When to Seek Professional Help

Seek medical attention if you experience persistent pain, swelling, or difficulty bearing weight after a foot injury, or if symptoms worsen despite initial treatment. Early evaluation can help identify nonunion and prevent further complications.

Tips for Medical Coders

Use this code for a subsequent encounter for a nondisplaced fracture of the second metatarsal bone in the unspecified foot with confirmed nonunion. Document the fracture's status (nonunion) and the encounter type (subsequent) to support coding. Ensure clinical documentation aligns with the code's specificity, including details about the fracture's location and healing status.