S52.333M Displaced oblique fracture of shaft of unspecified radius, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

Displaced oblique fracture of shaft of unspecified radius, subsequent encounter for open fracture type I or II with nonunion
ICD-10 Code: S52.333M

Summary

A displaced oblique fracture of the shaft of the unspecified radius is a break in the long, outer bone of the forearm (radius) between the elbow and wrist, where the fracture line runs diagonally and the bone fragments are misaligned. This injury is classified as an open fracture type I or II, meaning the overlying skin is breached but the wound is typically small and clean. The subsequent encounter indicates this is a follow-up visit for treatment, and the presence of nonunion means the fracture has failed to heal properly within the expected timeframe. The degree of displacement and associated soft tissue damage can influence arm function and recovery.

Causes

This fracture typically results from direct trauma, such as falls onto an outstretched arm, direct blows to the forearm, or accidents involving twisting forces at the wrist or elbow. High-impact events like motor vehicle collisions or sports injuries can also cause the bone to break in an oblique pattern. The open nature of the fracture suggests the trauma was severe enough to penetrate the skin, though the wound remains limited in size and contamination. Nonunion may occur due to inadequate immobilization, poor blood supply to the bone, infection, or excessive movement at the fracture site during healing.

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
• Poor nutrition, particularly deficiencies in calcium or vitamin D

Symptoms

• Persistent pain at the injury site, often worsening with activity
• Swelling, bruising, or deformity of the forearm that does not improve over time
• Inability to move the wrist or forearm fully
• Visible bone protrusion through the skin (in open fractures)
• Numbness or tingling in the hand or fingers
• A gap or abnormal movement at the fracture site upon examination

Diagnosis

Diagnosis is confirmed through a combination of clinical evaluation and imaging. A physical examination assesses for deformity, tenderness, and range of motion. X-rays are the primary imaging tool to visualize the fracture line, displacement, and signs of nonunion (e.g., a persistent gap between bone fragments or absence of callus formation). CT scans may be used to evaluate the fracture in more detail, especially if surgical intervention is being considered. The open fracture classification (type I or II) is determined by the size and cleanliness of the skin wound. Laboratory tests, such as blood work, may be ordered to check for infection or nutritional deficiencies that could affect healing.

Treatment Options

Treatment focuses on promoting bone healing and restoring function. Non-surgical options include immobilization with a cast or brace to stabilize the fracture, pain management with medications, and physical therapy to maintain joint mobility. Surgical intervention may be necessary if the fracture is severely displaced, unstable, or shows no signs of healing. Procedures may involve internal fixation with plates, screws, or rods, or bone grafting to stimulate healing. For open fractures, wound care is critical to prevent infection, and antibiotics may be prescribed. Follow-up imaging is used to monitor progress and assess for union.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, the success of treatment, and the patient’s overall health. Nonunion fractures may require extended treatment, including additional surgery or bone stimulation techniques. Most patients can expect improved function with proper care, but some may experience long-term stiffness, weakness, or chronic pain. Regular follow-up appointments are essential to monitor healing, adjust treatment plans, and address complications. Physical therapy is often recommended to restore strength and mobility once the fracture shows signs of healing.

Complications

• Nonunion or delayed union, requiring further intervention
• Infection, particularly with open fractures
• Nerve or blood vessel damage, leading to numbness, weakness, or circulation problems
• Arthritis in the wrist or elbow due to joint damage
• Chronic pain or stiffness in the forearm
• Malunion, where the bone heals in a misaligned position

Lifestyle & Prevention

• Avoid high-risk activities or use protective gear (e.g., wrist guards) during sports
• Maintain bone health through a diet rich in calcium and vitamin D and regular weight-bearing exercise
• Quit smoking, as it impairs bone healing
• Use proper techniques for lifting or repetitive tasks to reduce stress on the forearm
• Seek prompt treatment for fractures to minimize complications

When to Seek Professional Help

• Persistent or worsening pain, swelling, or deformity
• Signs of infection, such as fever, redness, or pus at the wound site
• Numbness, tingling, or loss of circulation in the hand or fingers
• Inability to move the wrist or forearm after immobilization
• No improvement in symptoms after several weeks of treatment

Tips for Medical Coders

This code (S52.333M) is used for a displaced oblique fracture of the radius shaft with nonunion, classified as an open fracture type I or II, during a subsequent encounter. Documentation should specify the fracture type (open I/II), the presence of nonunion, and that this is a follow-up visit. Ensure the encounter type (subsequent) and fracture characteristics (displaced, oblique, nonunion) are clearly documented to support accurate coding.