M93.022 Chronic slipped upper femoral epiphysis (nontraumatic), left hip

Name of the Condition

• Chronic slipped upper femoral epiphysis (nontraumatic), left hip

Summary

Chronic slipped upper femoral epiphysis (SUFE) is a condition where the femoral head (ball of the hip joint) gradually slips from its normal position on the femoral neck due to a fracture through the growth plate. This nontraumatic form develops slowly over time without a specific injury and primarily affects adolescents during growth spurts. The chronic nature indicates a prolonged or persistent displacement, which can lead to hip pain, stiffness, or gait changes. Prompt evaluation is important to prevent complications.

Causes

The exact cause of chronic 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. The chronic presentation suggests cumulative stress or delayed recognition of the displacement.

Risk Factors

• Age: Most common in adolescents aged 10–16 years, particularly during rapid growth spurts.
• Gender: Males are more frequently affected than females.
• Obesity: Higher body weight increases stress on the hip joint.
• Endocrine disorders: Conditions like hypothyroidism or growth hormone abnormalities may elevate risk.
• Family history: A genetic predisposition may increase susceptibility.

Symptoms

• Hip, thigh, or knee pain (often unilateral, may be referred to the knee).
• Limp or altered gait (e.g., walking with a limp or toe-out stance).
• Reduced range of motion in the affected hip, especially internal rotation.
• External rotation of the leg when flexed.
• Pain worsened by activity or weight-bearing.

Diagnosis

Diagnosis involves a physical exam to assess hip range of motion, gait, and pain patterns. Imaging studies, such as X-rays or MRI, are typically used to confirm the displacement of the femoral head. The chronic nature may be identified by the degree of slippage or associated changes in bone structure. Additional tests may be ordered to rule out underlying endocrine or metabolic conditions if risk factors are present.

Treatment Options

Treatment focuses on stabilizing the femoral head to prevent further slippage and relieve symptoms. Options may include:

• Surgical fixation: Pins or screws to secure the femoral head to the femoral neck.
• Activity modification: Reducing weight-bearing activities to minimize stress on the hip.
• Pain management: Medications or physical therapy to address discomfort and improve mobility.
• Monitoring: Regular follow-up imaging to assess healing and detect complications.

Prognosis and Follow-Up

With appropriate treatment, most patients recover well, though chronic SUFE may increase the risk of long-term hip problems, such as arthritis. Follow-up care is essential to monitor for complications and ensure proper healing. Physical therapy may be recommended to restore strength and mobility. Long-term outcomes depend on the severity of the slippage and adherence to treatment plans.

Complications

• Avascular necrosis: Reduced blood flow to the femoral head, potentially leading to bone death.
• Osteoarthritis: Premature wear and tear of the hip joint.
• Gait abnormalities: Persistent limping or altered walking patterns.
• Chondrolysis: Degeneration of cartilage in the hip joint.

Lifestyle & Prevention

• Maintain a healthy weight to reduce stress on the hip joint.
• Engage in regular, low-impact exercise to support joint health.
• Avoid high-impact activities that strain the hip.
• Monitor growth-related changes in adolescents, especially those with risk factors.

When to Seek Professional Help

Seek medical attention if you or your child experience:

• Persistent hip, thigh, or knee pain.
• Noticeable limp or difficulty walking.
• Reduced hip mobility or stiffness.
• Symptoms that worsen with activity or weight-bearing.

Tips for Medical Coders

Document the laterality (left hip) and chronic nature of the condition clearly in the medical record. Ensure the diagnosis is supported by clinical findings and imaging results. For coding, verify that the documentation aligns with the specific characteristics of chronic nontraumatic SUFE to support accurate code assignment.