M93.011 Acute slipped upper femoral epiphysis (nontraumatic), right hip

Name of the Condition

• Acute slipped upper femoral epiphysis (nontraumatic), right hip

Summary

Acute slipped upper femoral epiphysis (SUFE) is a condition where the femoral head (ball of the hip joint) displaces from its normal position on the femoral neck due to a fracture through the growth plate. This nontraumatic form occurs without a specific injury and is acute, indicating a recent onset. The right hip is specifically affected, and the condition is characterized by hip pain, gait changes, or reduced mobility, typically in adolescents during growth spurts.

Causes

The exact cause of acute nontraumatic SUFE is not fully understood, but it is associated with mechanical stress on the growth plate during rapid growth. Hormonal influences, such as those during puberty, may weaken the growth plate, allowing displacement. Obesity or increased weight can exacerbate stress on the hip joint, contributing to the condition. Unlike traumatic cases, acute nontraumatic SUFE develops gradually without a specific injury.

Risk Factors

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

Symptoms

• Hip, thigh, or knee pain (pain 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 hip, especially internal rotation.
• Mild swelling or tenderness in the hip or groin area.
• Inability to bear weight on the affected leg.

Diagnosis

Diagnosis involves a physical exam to assess hip mobility, pain, and gait. Imaging studies, such as X-rays or MRI, are typically used to confirm displacement of the femoral head. The acute nature of the condition may be identified by recent onset of symptoms and imaging findings. Clinical evaluation helps differentiate acute from chronic or traumatic cases.

Treatment Options

Treatment focuses on stabilizing the femoral head to prevent further displacement. Surgical intervention, such as in-situ pinning, is common to fix the epiphysis. Postoperative care includes activity modification and physical therapy to restore mobility. In some cases, close monitoring without surgery may be considered, depending on severity and patient factors.

Prognosis and Follow-Up

With prompt treatment, most patients recover well, though long-term follow-up is necessary to monitor for complications like avascular necrosis or arthritis. Regular check-ups and imaging may be recommended to assess hip function and detect late effects. Adherence to activity restrictions during recovery is critical for optimal outcomes.

Complications

• Avascular necrosis (loss of blood supply to the femoral head).
• Premature osteoarthritis of the hip.
• Chronic pain or limited mobility.
• Gait abnormalities or limb length discrepancy.

Lifestyle & Prevention

Maintaining a healthy weight reduces stress on the hip joint. Regular physical activity supports overall bone health, but high-impact sports should be avoided during recovery. Early recognition of symptoms (e.g., hip or knee pain, limping) in adolescents allows for timely evaluation and intervention.

When to Seek Professional Help

Seek medical attention if hip or knee pain persists, especially with limping, reduced mobility, or inability to bear weight. Prompt evaluation is essential to prevent progression and complications. Acute onset of symptoms in adolescents warrants urgent assessment.

Tips for Medical Coders

Use M93.011 for acute nontraumatic slipped upper femoral epiphysis affecting the right hip. Document the acute nature of the condition and the specific hip involved. Ensure clinical notes support the diagnosis, including imaging findings or physical exam details, to justify code specificity. Avoid using this code for traumatic or chronic cases.