M91.20 Coxa plana, unspecified hip

Name of the Condition

• Coxa Plana, Unspecified Hip
• Also known as Legg-Calvé-Perthes disease affecting an unspecified hip.

Summary

Coxa plana refers to the flattening of the femoral head in the hip joint, typically due to a temporary loss of blood supply. It's most common in children and can lead to hip pain and limping.

Causes

The exact cause is unclear, but it's believed to result from disrupted blood flow to the femoral head. May be related to genetic factors, trauma, or inflammation.

Risk Factors

• Age: Most commonly affects children between 4 and 10 years old.
• Gender: More prevalent in boys than girls.
• Family History: Genetics may play a role.
• Exposure to secondhand smoke: Some studies suggest an association.

Symptoms

• Limping or difficulty walking.
• Hip or groin pain that may extend to the thigh or knee.
• Stiffness and reduced range of motion in the hip.

Diagnosis

Diagnosis involves a physical examination to assess hip movement and pain levels, followed by imaging studies such as X-rays and MRI scans to observe changes in the femoral head.

Treatment Options

• Rest and Activity Modification: Reducing weight-bearing activities to prevent further damage.
• Physical Therapy: To maintain hip range of motion.
• Medications: Pain relief medications such as NSAIDs.
• Surgery: In severe cases, procedures like osteotomy to reshape the femoral head may be considered.

Prognosis and Follow-Up

Prognosis depends on the severity and age of onset. Early diagnosis and treatment can improve outcomes, but some cases may lead to long-term hip problems. Regular follow-up with imaging and physical assessments is typically recommended.

Complications

• Hip deformity: Persistent flattening of the femoral head.
• Arthritis: Increased risk of osteoarthritis in adulthood.
• Limited mobility: Reduced range of motion or gait abnormalities.

Lifestyle & Prevention

• Avoid high-impact activities: Reduce stress on the hip during active phases.
• Maintain a healthy weight: Minimize additional load on the joint.
• Monitor for symptoms: Early recognition can guide timely intervention.

When to Seek Professional Help

Seek medical attention if persistent hip pain, limping, or stiffness occurs, especially in children. Prompt evaluation is important to prevent complications.

Tips for Medical Coders

Document the affected hip (unspecified in this case) and any relevant clinical details. Ensure coding aligns with the absence of specified laterality or additional descriptors.