S52.335K Nondisplaced oblique fracture of shaft of left radius, subsequent encounter for closed fracture with nonunion

Name of the Condition

Nondisplaced oblique fracture of shaft of left radius, subsequent encounter for closed fracture with nonunion
ICD-10 Code: S52.335K

Summary

A nondisplaced oblique fracture of the shaft of the left radius is a break in the long, outer bone of the forearm (radius) between the elbow and wrist, where the fracture line runs at an angle across the bone and the bone fragments remain aligned. This code represents a subsequent encounter for a closed fracture that has failed to heal (nonunion) after an initial injury. Nonunion indicates the fracture site has not progressed to union within the expected timeframe, requiring ongoing management to promote healing or address complications.

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 nonunion aspect may arise from inadequate immobilization, poor blood supply to the fracture site, infection, or other factors that impede 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 or poor nutrition, which can impair bone healing
• Certain medical conditions (e.g., diabetes, vascular disease) that affect healing

Symptoms

• Persistent pain at the injury site, often lasting beyond the typical healing period
• Swelling or bruising that does not resolve with time
• Limited range of motion in the wrist or forearm
• Possible deformity or instability if the fracture has shifted (though initially nondisplaced)
• Sensation of the bone not "setting" or healing as expected

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and range of motion, followed by imaging studies. X-rays are typically used to confirm the fracture type, assess alignment, and evaluate for signs of nonunion (e.g., persistent fracture line, lack of callus formation). Additional tests, such as CT scans or bone scans, may be ordered to evaluate bone healing or detect underlying issues contributing to nonunion.

Treatment Options

Treatment focuses on promoting fracture union and may include:

• Prolonged immobilization with a cast or brace to stabilize the bone
• Surgical intervention, such as internal fixation with plates or screws, bone grafting, or electrical stimulation to encourage healing
• Pain management and physical therapy to restore function once healing progresses
• Addressing underlying factors (e.g., nutrition, smoking cessation) that may hinder recovery

Prognosis and Follow-Up

Prognosis depends on the severity of nonunion, patient health, and treatment adherence. With appropriate intervention, many fractures can eventually heal, but recovery may be prolonged. Regular follow-up with imaging is necessary to monitor healing progress. Some cases may require long-term management if union is not achieved.

Complications

• Chronic pain or discomfort at the fracture site
• Persistent nonunion requiring additional treatment
• Reduced range of motion or functional impairment
• Increased risk of future fractures in the affected bone
• Potential need for surgical revision if initial treatments fail

Lifestyle & Prevention

• Avoid high-risk activities until cleared by a healthcare provider
• Ensure adequate nutrition, including calcium and vitamin D, to support bone health
• Quit smoking, as it impairs healing
• Use protective gear during sports or activities with fall risks
• Follow post-treatment guidelines for immobilization and activity restrictions

When to Seek Professional Help

Seek care if:

• Pain worsens or does not improve with treatment
• Swelling, bruising, or deformity increases
• Numbness, tingling, or weakness in the hand or fingers develops
• The cast or brace becomes loose or uncomfortable
• There are signs of infection (e.g., redness, warmth, drainage)

Tips for Medical Coders

Use this code for a subsequent encounter (K) for a closed, nondisplaced oblique fracture of the left radius shaft with documented nonunion. Document must specify the nonunion and that the fracture remains closed. Ensure the encounter is not an initial treatment or for an open fracture. Verify the fracture’s location (shaft of left radius) and alignment (nondisplaced, oblique) to confirm code accuracy.