S52.364M Nondisplaced segmental fracture of shaft of radius, right arm, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

Nondisplaced segmental fracture of shaft of radius, right arm, subsequent encounter for open fracture type I or II with nonunion
ICD-10 Code: S52.364M

Summary

A nondisplaced segmental fracture of the shaft of the radius is a break in the long, outer bone of the forearm (radius) between the elbow and wrist, involving two separate fracture lines that create a free-floating segment of bone without misalignment. This injury is classified as an open fracture type I or II (skin breach with minimal soft tissue damage) and is now in the "subsequent encounter" phase, indicating ongoing care for a nonunion (failure of the bone to heal properly). The "right arm" specification denotes the affected side. Treatment focuses on addressing the nonunion and managing the open fracture to promote healing and restore function.

Causes

This fracture typically results from significant trauma, such as motor vehicle collisions, falls from height, or direct forceful impacts to the forearm. Twisting injuries or crush mechanisms can also produce the two distinct fracture lines characteristic of a segmental pattern. High-impact events are common triggers due to the force required to break the bone in multiple places while maintaining alignment. The nonunion may develop if initial healing is impaired by factors like inadequate stabilization, infection, or poor blood supply.

Risk Factors

• Participation in high-risk activities (e.g., contact sports, extreme sports)
• Osteoporosis or reduced bone density
• Advanced age, which increases fracture susceptibility
• Previous forearm or wrist injuries
• Poor initial fracture management or inadequate immobilization
• Smoking or other factors that impair bone healing

Symptoms

• Persistent pain at the fracture site, often worsening with activity
• Swelling, bruising, or deformity of the forearm
• Inability to move the wrist or forearm fully
• Visible or palpable gap at the fracture site (if nonunion is severe)
• Possible signs of infection (e.g., redness, drainage) if the open fracture persists

Diagnosis

Diagnosis is confirmed through clinical evaluation and imaging. A physical exam assesses pain, swelling, and functional limitations. X-rays or CT scans visualize the fracture pattern, nonunion, and any remaining open wound. The open fracture type (I or II) is determined by the extent of soft tissue damage. Additional tests, such as blood work, may be used to rule out infection or assess healing potential.

Treatment Options

Treatment focuses on stabilizing the nonunion and managing the open fracture. Options include surgical fixation (e.g., plates, screws, or bone grafting) to promote healing, wound care for the open fracture, and physical therapy to restore mobility. Antibiotics may be prescribed if infection is present. Non-surgical approaches, such as bracing or electrical stimulation, may be considered for select cases.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and response to treatment. Surgical intervention often improves outcomes, but healing may take months. Regular follow-up with imaging (X-rays) monitors progress. Physical therapy is critical to regain strength and function. Long-term monitoring is necessary to address potential complications like arthritis or chronic pain.

Complications

• Delayed or failed healing (persistent nonunion)
• Infection of the open fracture site
• Nerve or blood vessel damage
• Chronic pain or stiffness
• Post-traumatic arthritis in the wrist or elbow
• Malalignment if stabilization is inadequate

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a provider
• Follow weight-bearing restrictions to protect the healing bone
• Maintain a balanced diet rich in calcium and vitamin D to support bone health
• Quit smoking, as it impairs healing
• Use protective gear during sports or high-risk activities
• Attend all follow-up appointments to monitor progress

When to Seek Professional Help

Seek immediate care if you experience:

• Severe, worsening pain or swelling
• Signs of infection (e.g., fever, redness, pus)
• Numbness, tingling, or coldness in the hand or fingers
• Sudden loss of function in the arm or wrist
• New deformity or instability at the fracture site

Tips for Medical Coders

Document the fracture type (open I or II), nonunion status, and subsequent encounter details clearly. Specify the right arm and segmental nature of the fracture. Ensure documentation supports the open fracture classification and nonunion to justify the code. Note any surgical interventions or complications that may affect coding.