S32.313K Displaced avulsion fracture of unspecified ilium, subsequent encounter for fracture with nonunion

Name of the Condition

• Displaced avulsion fracture of unspecified ilium, subsequent encounter for fracture with nonunion

Summary

This condition involves a displaced avulsion fracture of the ilium, where a bone fragment is pulled away from the main ilium bone due to tendon or ligament tension. The ilium, the largest bone of the pelvis, supports the spine and hip joint. Displacement means the fractured fragment is no longer in its normal anatomical position, and the nonunion indicates the fracture has failed to heal properly during a subsequent encounter for care.

Causes

High-impact trauma such as falls, motor vehicle accidents, or direct blows to the hip/pelvis. Avulsion fractures often result from sudden, forceful muscle contractions (e.g., during sports or strenuous activity) that pull the bone fragment away from its attachment. Nonunion may develop due to inadequate immobilization, poor blood supply, or persistent motion at the fracture site.

Risk Factors

• Participation in high-impact sports or activities with sudden movements (e.g., sprinting, jumping).
• Previous hip or pelvic injuries.
• Chronic conditions that weaken bone or soft tissues (e.g., osteoporosis, tendinopathy).
• Age-related changes in bone density or muscle strength.
• Inadequate initial fracture management or noncompliance with treatment.

Symptoms

• Persistent or worsening pain in the hip, buttock, or pelvic region.
• Swelling, bruising, or tenderness over the affected area.
• Difficulty standing, walking, or bearing weight on the affected leg.
• Possible instability or limited range of motion in the hip.

Diagnosis

Physical examination to assess pain, swelling, and mobility. Imaging studies, such as X-rays or CT scans, to confirm the fracture and evaluate for nonunion. Additional tests, like bone scans or MRI, may be used to assess healing and blood supply.

Treatment Options

• Immobilization with braces or casts to stabilize the fracture.
• Pain management with medications or physical therapy.
• Surgical intervention, such as internal fixation or bone grafting, to promote healing.
• Rehabilitation to restore strength and mobility.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and response to treatment. Regular follow-up with imaging is necessary to monitor healing. Long-term outcomes may include persistent pain or functional limitations if healing is incomplete.

Complications

• Chronic pain or instability.
• Increased risk of future fractures.
• Nerve or vascular damage from the displaced fragment.
• Infection (if surgical intervention is required).

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Maintain bone health with proper nutrition and exercise.
• Use protective gear during sports or high-risk activities.
• Follow post-treatment guidelines to support healing.

When to Seek Professional Help

Seek immediate care if pain worsens, swelling increases, or mobility is severely limited. Contact a provider if symptoms persist despite treatment or if new symptoms (e.g., fever, numbness) develop.

Tips for Medical Coders

Document the encounter as a subsequent visit for fracture with nonunion. Include details on the fracture's location (unspecified ilium), displacement, and failure to heal. Ensure clinical notes support the nonunion diagnosis and subsequent care context.