S92.323K Displaced fracture of second metatarsal bone, unspecified foot, subsequent encounter for fracture with nonunion

Name of the Condition

• Technical Term: Displaced fracture of second metatarsal bone, unspecified foot, subsequent encounter for fracture with nonunion
• ICD-10 Code: S92.323K
• Common Name: Broken second metatarsal (unspecified foot), follow-up for nonunion

Summary

A displaced fracture of the second metatarsal bone in an unspecified foot, with nonunion, refers to a break in the long bone of the midfoot where fragments remain misaligned and have failed to heal properly. This condition occurs during a subsequent encounter, indicating ongoing management of a fracture that did not unite as expected. The injury may impact weight-bearing ability and mobility, depending on the extent of displacement and associated soft tissue damage.

Causes

Direct trauma to the foot, such as a fall, sports injury, or heavy object impact, is the primary cause. Repetitive stress from activities like running or jumping can also lead to fractures over time. Twisting the foot or sudden impact may result in displacement, particularly in high-impact scenarios. Nonunion may develop due to inadequate immobilization, poor blood supply, infection, or underlying health conditions that impair healing.

Risk Factors

• Participation in high-impact sports (e.g., basketball, soccer)
• 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 other factors that impair circulation
• Previous foot injuries or fractures

Symptoms

• Persistent pain and tenderness in the midfoot area
• Swelling and bruising around the affected bone
• Difficulty bearing weight or walking
• Visible deformity or misalignment of the foot
• Limited range of motion in the affected toe

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and deformity. Imaging studies, such as X-rays or CT scans, are used to confirm the fracture, evaluate displacement, and assess for nonunion. Additional tests, like bone scans or MRI, may be ordered to evaluate blood flow or soft tissue involvement. The "subsequent encounter" and "nonunion" descriptors guide clinical focus on healing status and complications.

Treatment Options

Treatment may include immobilization with a cast or brace to stabilize the fracture. Surgical intervention, such as internal fixation or bone grafting, may be necessary to promote healing. Physical therapy helps restore mobility and strength. Pain management and addressing underlying conditions (e.g., poor circulation) are also part of the care plan. Follow-up imaging monitors progress.

Prognosis and Follow-Up

Prognosis depends on the severity of displacement, patient health, and response to treatment. Nonunion may require extended healing time or additional interventions. Regular follow-up appointments are essential to assess healing, adjust treatment, and prevent complications. Long-term mobility and function depend on successful union and rehabilitation.

Complications

• Chronic pain or discomfort
• Persistent instability or deformity
• Increased risk of future fractures
• Arthritis or joint damage in the foot
• Infection (if surgical intervention is needed)
• Reduced quality of life due to mobility limitations

Lifestyle & Prevention

• Wear supportive, properly fitting footwear to reduce injury risk.
• Avoid high-impact activities that strain the foot.
• Maintain bone health through a balanced diet and regular exercise.
• Address underlying conditions (e.g., osteoporosis) that affect healing.
• Follow post-injury care instructions to support recovery.

When to Seek Professional Help

Seek medical attention if pain worsens, swelling increases, or mobility declines. Contact a healthcare provider if signs of infection (e.g., redness, fever) appear or if the foot does not improve with initial treatment. Prompt evaluation is important for managing nonunion and preventing further complications.

Tips for Medical Coders

Document the encounter as a "subsequent" visit for a fracture with nonunion. Include details on the fracture's status, treatment provided, and any imaging or clinical findings supporting nonunion. Ensure the unspecified foot is clearly noted, and avoid assumptions about laterality or specific foot involvement. Follow clinical guidelines for coding fractures with delayed healing.