S92.146K Nondisplaced dome fracture of unspecified talus, subsequent encounter for fracture with nonunion

Name of the Condition

• Nondisplaced dome fracture of unspecified talus, subsequent encounter for fracture with nonunion

Summary

A nondisplaced dome fracture of the talus involves a break in the dome-shaped upper surface of the talus bone without displacement of the bone fragments. This injury affects the ankle joint and can impact weight-bearing and mobility. The talus connects the foot to the lower leg and is essential for joint stability and movement. This code is used for a subsequent encounter when the fracture has failed to heal (nonunion).

Causes

Direct trauma to the ankle, such as falls, sports injuries, or motor vehicle accidents, is the primary cause. High-impact forces or twisting motions can lead to this fracture, particularly in activities involving sudden stops or changes in direction. Nonunion may occur due to inadequate initial treatment, poor blood supply to the talus, or persistent instability.

Risk Factors

• Participation in high-impact sports (e.g., basketball, soccer) or activities with a risk of ankle injury.
• Osteoporosis or other conditions that weaken bone density.
• Previous ankle or talus injuries.
• Improper footwear or inadequate protective gear during physical activities.
• Factors that impair healing, such as smoking or diabetes.

Symptoms

• Persistent pain in the ankle or foot, often worsening with activity.
• Swelling and bruising around the injury site.
• Difficulty bearing weight or walking.
• Limited range of motion in the ankle joint.
• Possible instability or clicking sensations during movement.

Diagnosis

A healthcare provider will perform a physical examination to assess pain, swelling, and mobility. Imaging tests, such as X-rays or CT scans, are used to confirm the fracture and evaluate for nonunion. Additional tests, like MRI, may be ordered to assess blood supply or soft tissue involvement.

Treatment Options

Treatment depends on the severity of nonunion and patient factors. Options may include immobilization with a cast or brace, physical therapy to improve strength and mobility, or surgical intervention to stabilize the fracture and promote healing. Pain management and activity modification are often part of the plan.

Prognosis and Follow-Up

Prognosis varies based on the extent of nonunion and treatment response. Regular follow-up with imaging is typically required to monitor healing. Long-term outcomes may include persistent pain or reduced mobility if healing is incomplete, but many patients achieve functional recovery with appropriate care.

Complications

• Chronic pain or arthritis in the ankle joint.
• Persistent instability or difficulty walking.
• Need for additional surgery if nonunion progresses.
• Increased risk of future fractures due to weakened bone.

Lifestyle & Prevention

• Wear appropriate footwear and protective gear during high-risk activities.
• Maintain bone health through a balanced diet and regular exercise.
• Avoid smoking, as it impairs bone healing.
• Follow post-injury guidelines to reduce the risk of nonunion.

When to Seek Professional Help

Seek care if pain worsens, swelling increases, or mobility declines after an injury. Prompt evaluation is important if nonunion is suspected, as early intervention may improve outcomes.

Tips for Medical Coders

Use this code for a subsequent encounter when the nondisplaced dome fracture of the talus has failed to heal (nonunion). Document the fracture's status, treatment provided, and any complications to support coding accuracy. Ensure the encounter is classified as "subsequent" and that nonunion is clearly noted in the medical record.