S52.365M Nondisplaced segmental fracture of shaft of radius, left arm, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

Nondisplaced segmental fracture of shaft of radius, left arm, subsequent encounter for open fracture type I or II with nonunion
ICD-10 Code: S52.365M

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, where the bone is separated into two or more fragments that remain in their original alignment. This injury typically results from significant trauma and may impair arm function depending on associated soft tissue damage. The "nondisplaced" nature means the bone fragments are not shifted out of position, which can influence treatment and recovery. The "subsequent encounter for open fracture type I or II with nonunion" indicates this is a follow-up visit for a fracture that previously broke the skin (with minimal contamination) and has failed to heal properly.

Causes

This fracture commonly occurs due to direct trauma, such as falls onto an outstretched arm, high-impact blows to the forearm, or accidents involving twisting forces at the wrist or elbow. Motor vehicle collisions, sports injuries, or forceful impacts may also cause the bone to break into multiple segments without displacing them. Open fractures result when the broken bone pierces the skin, often from the same traumatic events. Nonunion may develop if the fracture does not heal within the expected timeframe, potentially due to inadequate immobilization, poor blood supply, or infection.

Risk Factors

• Participation in contact sports or activities with a high risk of falls
• Osteoporosis or weakened bone density
• Advanced age, which increases fracture susceptibility
• Previous forearm or wrist injuries
• Occupations or hobbies involving repetitive stress or heavy lifting
• Smoking, which impairs bone healing
• Diabetes or other conditions affecting circulation

Symptoms

• Persistent pain at the injury site, often worsening with activity
• Swelling, bruising, or deformity of the forearm
• Inability to move the wrist or elbow fully
• Visible or palpable gap at the fracture site (if nonunion is severe)
• Possible signs of infection, such as redness, warmth, or drainage (if open fracture is involved)

Diagnosis

Diagnosis typically involves a physical examination to assess pain, swelling, and range of motion. Imaging studies, such as X-rays, are used to confirm the fracture type, assess alignment, and check for nonunion (e.g., a visible gap between bone fragments or lack of callus formation). CT scans may be ordered for detailed visualization of the fracture site. The history of the injury and prior treatment is critical to determine if the fracture is a subsequent encounter with nonunion.

Treatment Options

Treatment focuses on promoting healing and restoring function. Options may include immobilization with a cast or brace, surgical intervention (e.g., bone grafting, internal fixation) to stabilize the fracture, or bone stimulation therapies. Antibiotics may be prescribed if infection is present. Physical therapy is often recommended to regain strength and mobility once healing progresses. The choice of treatment depends on the severity of nonunion, patient health, and functional goals.

Prognosis and Follow-Up

Prognosis varies based on the extent of nonunion, patient age, and overall health. With appropriate treatment, many patients achieve successful healing and restored function, though recovery may be prolonged. Regular follow-up appointments are necessary to monitor healing progress, adjust treatment, and address complications. Long-term outcomes depend on adherence to treatment plans and rehabilitation.

Complications

• Delayed or failed healing (nonunion)
• Infection, particularly if the fracture was open
• Nerve or blood vessel damage
• Chronic pain or stiffness
• Malunion (healing in an incorrect position)
• Reduced grip strength or range of motion

Lifestyle & Prevention

• Avoid high-risk activities until cleared by a healthcare provider
• Use protective gear during sports or manual labor
• Maintain bone health through a balanced diet rich in calcium and vitamin D
• Quit smoking to improve healing potential
• Perform exercises to strengthen forearm muscles as recommended by a therapist

When to Seek Professional Help

Seek immediate medical attention if you experience:

• Sudden, severe pain or swelling at the injury site
• Visible bone protruding through the skin
• Numbness, tingling, or coldness in the hand or fingers
• Inability to move the wrist or elbow
• Signs of infection, such as fever, redness, or drainage

Tips for Medical Coders

This code (S52.365M) is used for a subsequent encounter for an open fracture type I or II of the left radius shaft with nonunion. Document the fracture type (open I/II), laterality (left arm), and the presence of nonunion clearly. Ensure the encounter is classified as "subsequent" (not initial or acute) and that the fracture’s open nature and nonunion are explicitly stated in the medical record. Verify that the fracture is segmental and nondisplaced to match the code’s specificity.