M35.7 Hypermobility syndrome

Name of the Condition

• Hypermobility Syndrome

Summary

Hypermobility syndrome is characterized by excessive joint flexibility beyond the normal range, often leading to joint instability and related symptoms. It may occur as a standalone condition or as part of broader connective tissue disorders. The condition primarily affects joint function and can contribute to musculoskeletal complaints.

Causes

The exact cause is often multifactorial, involving genetic factors that influence collagen structure and joint laxity. In some cases, it may be associated with underlying connective tissue disorders, though many individuals with hypermobility do not have a specific underlying disease.

Risk Factors

• Genetic Predisposition: Family history of hypermobility or related connective tissue conditions.
• Age: More commonly recognized in children and young adults, though symptoms may persist into adulthood.
• Gender: Higher prevalence in females.
• Underlying Conditions: Association with disorders like Ehlers-Danlos syndrome in some cases.

Symptoms

• Joint pain, especially in weight-bearing joints (e.g., knees, hips)
• Frequent joint dislocations or subluxations
• Muscle fatigue or strain
• Soft tissue injuries (e.g., sprains)
• Joint instability or "giving way"

Diagnosis

Diagnosis is based on clinical evaluation, including assessment of joint range of motion and history of symptoms. The Beighton score may be used to quantify hypermobility. Laboratory tests or imaging are typically not required unless other conditions are suspected.

Treatment Options

• Physical therapy to strengthen supporting muscles and improve joint stability
• Pain management with NSAIDs or other analgesics
• Bracing or orthotics for joint support
• Activity modification to avoid high-impact movements
• Occupational therapy for functional adaptations

Prognosis and Follow-Up

Prognosis varies; many individuals manage symptoms effectively with conservative measures. Regular follow-up may be needed to monitor joint health and address complications. Long-term outcomes depend on the severity of joint instability and associated symptoms.

Complications

• Chronic joint pain or arthritis
• Recurrent injuries (e.g., sprains, dislocations)
• Functional limitations in daily activities
• Increased risk of early osteoarthritis in affected joints

Lifestyle & Prevention

• Engage in low-impact exercise (e.g., swimming, yoga) to maintain strength without stressing joints
• Avoid activities with high joint stress (e.g., heavy lifting, contact sports)
• Use proper body mechanics to reduce injury risk
• Maintain a healthy weight to minimize joint load

When to Seek Professional Help

Seek care if joint pain is severe, persistent, or worsening; if joints frequently dislocate; or if symptoms interfere with daily activities. Prompt evaluation is recommended for new or unexplained joint instability.

Tips for Medical Coders

Document the presence of joint hypermobility, associated symptoms (e.g., pain, instability), and any underlying connective tissue disorders. Ensure clinical correlation to support the diagnosis, as hypermobility may be a feature of other conditions. Code M35.7 is appropriate when hypermobility syndrome is the primary diagnosis and not better classified under another specific disorder.