M71.18 Other infective bursitis, other site

Name of the Condition

• Other infective bursitis, other site

Summary

Other infective bursitis, other site, refers to an infection of a bursa (a small fluid-filled sac that reduces friction between tissues) at a site not specified by more detailed codes. This condition involves microbial invasion of the bursa, leading to inflammation, pain, and potential functional impairment. The infection may be bacterial or non-bacterial, and the "other site" designation indicates the affected bursa is documented but not categorized under more specific anatomical locations.

Causes

Other infective bursitis, other site, typically results from bacterial infection, often introduced through direct trauma, skin breakdown, or spread from adjacent tissues. Common causative organisms include Staphylococcus aureus. Non-bacterial infections or secondary infection of a pre-existing bursitis may also occur, though the exact etiology varies by case. The "other site" designation suggests the clinical record specifies a bursa location that is not covered by more precise codes.

Risk Factors

• Recent injury or surgery near a bursa
• Skin infections or open wounds in the vicinity
• Immunocompromised states (e.g., diabetes, HIV)
• Chronic inflammatory conditions (e.g., rheumatoid arthritis)
• Repetitive motion or pressure on the bursa

Symptoms

• Localized pain, swelling, and warmth over the bursa
• Redness or erythema at the site
• Fever or systemic signs of infection
• Limited range of motion in adjacent joints
• Pus drainage if the infection progresses

Diagnosis

Diagnosis involves a physical examination to assess bursal characteristics, including tenderness, warmth, and swelling. Imaging (e.g., ultrasound) may confirm fluid accumulation or inflammation. Aspiration of the bursa for fluid analysis (e.g., culture, Gram stain) helps identify the causative organism. Clinical correlation with patient history and symptoms is essential to confirm infection.

Treatment Options

Treatment typically includes antibiotic therapy (targeted to the identified organism) and rest to reduce bursal stress. Drainage of infected fluid may be necessary for severe cases. Pain management and anti-inflammatory measures (e.g., NSAIDs) may be used adjunctively. Surgical intervention is rare but considered for persistent or complicated infections.

Prognosis and Follow-Up

Prognosis is generally favorable with prompt treatment, though delays can lead to chronic inflammation or abscess formation. Follow-up involves monitoring for symptom resolution and repeat imaging if needed. Patients should be advised to avoid re-injury or pressure on the affected site during recovery.

Complications

Potential complications include chronic bursitis, abscess formation, or spread of infection to surrounding tissues. Untreated cases may result in functional impairment or systemic infection (e.g., sepsis) in severe instances.

Lifestyle & Prevention

• Avoid repetitive motion or excessive pressure on bursae.
• Maintain skin integrity to prevent infection entry.
• Manage underlying conditions (e.g., diabetes) to reduce infection risk.
• Use protective gear during activities that stress bursae.

When to Seek Professional Help

Seek care if symptoms worsen (e.g., increasing pain, fever, pus drainage) or if mobility is significantly impaired. Prompt evaluation is critical for suspected infection to prevent complications.

Tips for Medical Coders

Document the specific bursa site (e.g., elbow, hip) when available to ensure accurate coding. If the site is documented but not covered by a more specific code, use M71.18. Verify that clinical documentation supports infective etiology (e.g., positive culture, signs of infection) to justify the code.