S52.366H Nondisplaced segmental fracture of shaft of radius, unspecified arm, subsequent encounter for open fracture type I or II with delayed healing

Name of the Condition

Nondisplaced segmental fracture of shaft of radius, unspecified arm, subsequent encounter for open fracture type I or II with delayed healing
ICD-10 Code: S52.366H

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 without misalignment. This injury typically results from significant trauma and may impair arm function depending on the degree of soft tissue damage. The "unspecified arm" designation indicates the affected side is not documented. The "subsequent encounter" modifier specifies this is a follow-up visit for an established fracture, while "open fracture type I or II" indicates the skin was breached but with minimal soft tissue damage. "Delayed healing" denotes that the fracture is not progressing as expected during the healing process.

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. Open fractures occur when the broken bone pierces the skin, often from high-energy trauma. Delayed healing may result from factors like poor blood supply, infection, or inadequate immobilization.

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, even with immobilization
• Swelling, bruising, or deformity of the forearm
• Inability to move the wrist or forearm
• Visible bone protrusion through the skin (in open fractures)
• Delayed or absent healing signs (e.g., lack of callus formation on imaging)
• Possible infection signs (e.g., redness, warmth, drainage) in open fractures

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and range of motion. Imaging studies, such as X-rays or CT scans, confirm the fracture type, displacement, and healing status. For open fractures, evaluation of the wound and soft tissue damage is critical. Delayed healing is diagnosed when imaging shows insufficient bone repair over time, often requiring repeated assessments. Clinical judgment determines if additional tests (e.g., blood work for infection) are needed.

Treatment Options

Treatment focuses on stabilizing the fracture and promoting healing. Immobilization with a cast or splint is standard, with possible surgical intervention (e.g., internal fixation) if alignment is compromised. Open fractures require wound care and antibiotics to prevent infection. For delayed healing, options may include bone stimulation devices, adjusted immobilization, or surgery to improve blood flow. Physical therapy helps restore function once healing progresses.

Prognosis and Follow-Up

Prognosis depends on fracture severity, patient health, and adherence to treatment. Nondisplaced fractures generally heal well with proper care, but delayed healing may extend recovery time. Follow-up visits monitor healing via imaging and clinical assessment. Adjustments to treatment (e.g., extended immobilization, surgery) may be needed if progress is insufficient. Most patients regain full function, but outcomes vary based on individual factors.

Complications

• Infection (especially in open fractures)
• Nonunion (failure of the bone to heal)
• Malunion (healing in an incorrect position)
• Chronic pain or stiffness
• Nerve or blood vessel damage
• Reduced range of motion or strength
• Need for additional surgeries

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 and limit alcohol, as both impair bone healing.
• Use proper techniques for lifting or repetitive tasks to reduce forearm strain.
• Seek prompt treatment for injuries to prevent complications.

When to Seek Professional Help

• Severe or worsening pain, swelling, or deformity.
• Signs of infection (e.g., fever, redness, drainage).
• Numbness, tingling, or coldness in the hand or fingers.
• Inability to move the wrist or forearm.
• Lack of healing progress (e.g., persistent pain after several weeks).
• Open wounds or visible bone protrusion.

Tips for Medical Coders

Document the fracture type (nondisplaced segmental), affected bone (radius shaft), arm specification (unspecified), encounter type (subsequent), open fracture details (type I or II), and healing status (delayed) to support accurate coding. Ensure clinical notes confirm the fracture’s characteristics and healing timeline, as these impact code assignment. Verify that "subsequent encounter" aligns with follow-up care for an established fracture, and that "delayed healing" is clinically supported by imaging or provider assessment.