M71.86 Other specified bursopathies, knee

Name of the Condition

• Other specified bursopathies, knee

Summary

Other specified bursopathies of the knee refer to inflammatory or non-inflammatory conditions affecting the bursae (small fluid-filled sacs that reduce friction between tissues) in the knee region. These conditions may involve bursal irritation, swelling, or structural changes, leading to localized pain or functional impairment. The knee contains multiple bursae, and this code is used when the bursopathy is not classified under more specific knee bursitis codes.

Causes

Other bursopathies of the knee can result from direct trauma, repetitive motion, infection, or systemic inflammatory conditions. They may also arise from metabolic or degenerative processes affecting the bursa, though the exact etiology varies by case. Overuse or acute injury to the knee joint or surrounding structures can contribute to bursal irritation.

Risk Factors

• Repetitive or prolonged pressure on knee bursae (e.g., from kneeling, prolonged squatting)
• Occupational or athletic activities involving repetitive knee use
• Pre-existing inflammatory conditions (e.g., rheumatoid arthritis)
• Recent injury or surgery near a knee bursa
• Age-related degenerative changes in the knee

Symptoms

• Localized pain or tenderness over the affected knee bursa
• Swelling or visible lump at the site
• Reduced range of motion in the knee
• Discomfort with movement or pressure
• Possible warmth or redness if inflamed

Diagnosis

Diagnosis typically involves a physical examination to assess bursal characteristics, along with imaging (e.g., ultrasound, MRI) to evaluate tissue changes. Fluid aspiration or biopsy may be performed to rule out infection or other conditions if clinically indicated.

Treatment Options

Treatment may include rest, ice, compression, and elevation (RICE) to reduce inflammation. Nonsteroidal anti-inflammatory drugs (NSAIDs) or corticosteroid injections may be used for pain relief. Physical therapy to improve strength and mobility, and activity modification to avoid aggravating movements, are often recommended. In severe or persistent cases, surgical intervention may be considered.

Prognosis and Follow-Up

Prognosis depends on the underlying cause and severity of the condition. Most cases improve with conservative management, but chronic or recurrent bursopathies may require ongoing monitoring. Follow-up care may involve regular assessments to evaluate symptom resolution and functional recovery.

Complications

Untreated or severe bursopathies may lead to chronic pain, limited mobility, or infection. Rarely, persistent inflammation can result in bursal calcification or structural damage to surrounding tissues.

Lifestyle & Prevention

• Avoid prolonged kneeling or repetitive knee stress
• Use protective padding during activities that strain the knee
• Maintain a healthy weight to reduce joint stress
• Engage in regular low-impact exercise to strengthen knee muscles
• Address underlying inflammatory conditions promptly

When to Seek Professional Help

Seek medical attention if symptoms worsen, persist despite home care, or are accompanied by fever, severe swelling, or inability to bear weight. Prompt evaluation is important if infection is suspected or if mobility is significantly impaired.

Tips for Medical Coders

Use M71.86 for other specified bursopathies affecting the knee when the condition is not classified under a more specific bursitis code. Document the affected bursa (e.g., prepatellar, infrapatellar) and any contributing factors (e.g., trauma, overuse) to support code assignment. Ensure clinical correlation with symptoms and diagnostic findings.