S52.122M Displaced fracture of head of left radius, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

• Common Name: Displaced Fracture of Head of Left Radius (Subsequent Encounter for Open Fracture Type I or II with Nonunion)
• Medical Term: S52.122M

Summary

A displaced fracture of the head of the left radius, subsequent encounter for open fracture type I or II with nonunion, is a break in the proximal radius bone involving the radial head, with bone fragments shifted out of alignment. The fracture is open (compound), classified as type I or II (minimal soft tissue damage), and has failed to heal (nonunion) during a subsequent encounter for treatment. This injury affects the left forearm near the elbow joint and typically results from trauma. The open nature of the fracture increases infection risk, and nonunion requires specific management to promote healing.

Causes

Displaced open fractures of the radial head usually result from high-impact trauma to the elbow or forearm, such as falls onto an outstretched hand, direct impacts, or rotational forces. Open fractures occur when the broken bone pierces the skin or when external force damages the soft tissue over the fracture site. Motor vehicle accidents, sports injuries, or occupational trauma are common causes. Nonunion may develop due to inadequate initial treatment, poor blood supply to the bone, infection, or excessive movement at the fracture site.

Risk Factors

• Participation in contact sports or activities with a high risk of falls or collisions.
• Osteoporosis or other bone-weakening conditions that reduce bone density.
• Advanced age, which may decrease bone strength.
• Occupational hazards involving repetitive stress or trauma to the arm.
• Poor initial fracture management or inadequate immobilization.

Symptoms

• Persistent pain localized to the elbow or forearm, often worsening with movement.
• Swelling and bruising around the affected area.
• Difficulty rotating the forearm (supination/pronation).
• Visible or palpable abnormal movement at the fracture site (in some cases).
• Possible signs of infection, such as redness, warmth, or drainage (if present).

Diagnosis

Diagnosis involves a thorough clinical evaluation, including a detailed history of the injury and symptoms. Physical examination assesses pain, swelling, range of motion, and stability of the elbow joint. Imaging studies, such as X-rays, are used to confirm the fracture, assess displacement, and evaluate for nonunion (e.g., visible gap between bone fragments or lack of healing progress). CT scans may be ordered to better visualize the fracture pattern and nonunion site. Laboratory tests (e.g., inflammatory markers) may be performed if infection is suspected.

Treatment Options

Treatment focuses on promoting bone healing and managing the open fracture. Nonoperative management may include immobilization with a cast or splint, activity modification, and pain control. Surgical intervention, such as open reduction and internal fixation (ORIF) or bone grafting, is often required to stabilize the fracture and address nonunion. Antibiotics are prescribed if infection is present. Physical therapy is initiated once healing allows to restore function and strength.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, success of treatment, and presence of complications. Nonunion may delay recovery, requiring additional interventions. Regular follow-up with imaging (e.g., X-rays) monitors healing progress. Physical therapy is critical to regain mobility and strength. Long-term outcomes may include residual stiffness or reduced range of motion, but most patients achieve functional recovery with appropriate care.

Complications

• Nonunion or delayed union of the fracture.
• Infection of the open fracture site.
• Arthritis or joint stiffness in the elbow.
• Nerve or blood vessel damage (rare).
• Chronic pain or functional impairment.

Lifestyle & Prevention

• Avoid high-risk activities until fully healed.
• Use protective gear during sports or work.
• Maintain bone health with a balanced diet rich in calcium and vitamin D.
• Follow post-treatment activity restrictions to support healing.
• Engage in prescribed physical therapy to restore function.

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Severe pain, swelling, or deformity after an injury.
• Inability to move the elbow or forearm.
• Signs of infection (e.g., redness, warmth, drainage).
• Worsening pain or symptoms despite treatment.

Tips for Medical Coders

Document the fracture type (open, type I or II), laterality (left), and encounter type (subsequent) clearly. Note the presence of nonunion and any associated complications. Ensure documentation supports the open fracture classification and confirms the fracture has failed to unite. Code S52.122M is specific to the left radius; do not use for right-sided or unspecified fractures. Verify that the encounter is subsequent (not initial) and that nonunion is explicitly documented.