M93.00 Unspecified slipped upper femoral epiphysis (nontraumatic)

Name of the Condition

• Unspecified slipped upper femoral epiphysis (nontraumatic)

Summary

Slipped upper femoral epiphysis (SUFE) is a condition where the femoral head (ball of the hip joint) shifts relative to the femoral neck due to a fracture through the growth plate. This nontraumatic form occurs without a specific injury and may lead to hip pain, limping, or altered gait. The condition typically affects adolescents during growth spurts and requires prompt evaluation to prevent complications.

Causes

The exact cause of nontraumatic SUFE is not fully understood, but it is associated with mechanical stress on the growth plate during rapid growth. Hormonal changes, particularly those affecting growth plate stability, may contribute. In some cases, underlying endocrine disorders or obesity may play a role, though the condition can also occur without identifiable triggers.

Risk Factors

• Age (most common in adolescents aged 10–16)
• Obesity or rapid weight gain
• Male gender (higher prevalence)
• Endocrine disorders (e.g., hypothyroidism, growth hormone abnormalities)
• Family history of SUFE

Symptoms

• Hip, thigh, or knee pain (often unilateral)
• Limp or altered gait
• Reduced range of motion in the affected hip
• External rotation of the leg when flexed
• Pain worsened by activity or weight-bearing

Diagnosis

Diagnosis involves a physical examination to assess hip mobility, pain, and gait. Imaging, typically X-rays of the pelvis and hips, confirms the displacement of the femoral head. In some cases, MRI may be used to evaluate the growth plate or detect early changes not visible on X-rays. Clinical correlation with symptoms and risk factors is essential.

Treatment Options

Treatment focuses on stabilizing the femoral head to prevent further slippage. Options include:

• Surgical fixation (e.g., in-situ pinning) for most cases
• Activity modification and pain management for mild or stable cases
• Close monitoring for bilateral involvement or progression

Prognosis and Follow-Up

With early diagnosis and appropriate treatment, outcomes are generally favorable. However, untreated or delayed treatment can lead to long-term complications like avascular necrosis or arthritis. Follow-up includes regular imaging and clinical assessments to monitor hip function and address any residual issues.

Complications

• Avascular necrosis of the femoral head
• Premature osteoarthritis
• Chronic hip pain or stiffness
• Gait abnormalities or leg-length discrepancy

Lifestyle & Prevention

• Maintain a healthy weight to reduce stress on the hips
• Avoid high-impact activities that strain the hips during growth spurts
• Promptly address hip or knee pain in adolescents
• Regular physical activity with proper form to support joint health

When to Seek Professional Help

Seek immediate medical attention if a child or adolescent experiences:

• Sudden or worsening hip, thigh, or knee pain
• Inability to bear weight or walk normally
• Persistent limping or altered gait
• Signs of hip instability or reduced mobility

Tips for Medical Coders

Document the affected side (unspecified in this code) and confirm nontraumatic etiology. Include details on imaging findings, treatment, and any bilateral involvement if applicable. Ensure clinical correlation to support the diagnosis and avoid miscoding traumatic slips.