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

Name of the Condition

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

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 malunion phase, meaning the bone has healed in a non-anatomic position. The "right arm" specification indicates the affected side, and "subsequent encounter" denotes follow-up care after the initial treatment phase. Management focuses on addressing the malunion and monitoring for complications.

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.

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
• Occupation or hobbies involving repetitive stress or heavy lifting

Symptoms

• Persistent pain at the injury site, often with altered sensation
• Visible or palpable deformity due to malunion
• Limited range of motion in the wrist or forearm
• Possible swelling or bruising around the healed fracture
• Functional impairment, such as difficulty gripping or lifting

Diagnosis

Diagnosis is confirmed through clinical evaluation and imaging. A physical exam assesses deformity, range of motion, and neurovascular status. X-rays or CT scans visualize the fracture pattern, malunion, and any remaining displacement. The open fracture classification (type I or II) is documented based on the initial injury, while malunion is identified by abnormal bone healing on imaging.

Treatment Options

Treatment depends on the severity of malunion and functional impact. Options may include:

• Observation for asymptomatic cases
• Physical therapy to improve strength and mobility
• Orthopedic referral for possible corrective surgery (e.g., osteotomy) if malunion causes significant dysfunction
• Pain management and activity modification

Prognosis and Follow-Up

Prognosis varies based on malunion severity and functional demands. Most patients achieve acceptable function with conservative management, but malunion may lead to long-term stiffness or weakness. Follow-up care focuses on monitoring healing, assessing functional recovery, and addressing complications. Regular imaging may be used to track bone alignment.

Complications

• Chronic pain or discomfort
• Reduced range of motion or stiffness
• Nerve or vascular impairment due to malunion
• Increased risk of future fractures in the affected area
• Psychological impact from prolonged recovery

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider
• Use protective gear during sports or risky activities
• Maintain bone health through adequate calcium and vitamin D intake
• Engage in strength training to support forearm and wrist function
• Follow post-treatment guidelines to prevent re-injury

When to Seek Professional Help

Seek care if you experience:

• Worsening pain, swelling, or deformity
• Numbness, tingling, or coldness in the hand or fingers
• Inability to move the wrist or forearm
• Signs of infection (e.g., redness, pus, fever)
• Sudden functional decline or new symptoms

Tips for Medical Coders

Document the fracture type (open I or II), malunion status, and subsequent encounter details clearly. Ensure the "right arm" specification is included, and note any associated complications or treatment interventions. Code S52.364Q is specific to follow-up care for this injury with malunion; verify that the encounter aligns with the "subsequent" phase of treatment.