M71.00 Abscess of bursa, unspecified site

Name of the Condition

• Abscess of bursa, unspecified site

Summary

An abscess of the bursa is a localized collection of pus within a bursa, a small fluid-filled sac that reduces friction between tissues. This condition typically causes pain, swelling, and warmth at the affected site. The unspecified site designation indicates the abscess can occur in any bursa without further localization.

Causes

Abscesses of the bursa usually result from bacterial infection, often introduced through direct trauma, skin breakdown, or spread from adjacent tissues. Staphylococcus aureus is a common causative organism. Non-infectious causes, such as foreign body reaction or sterile inflammation, are less frequent.

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, tenderness, or throbbing
• Swelling, redness, or warmth over the bursa
• Limited range of motion in adjacent joints
• Possible fever or systemic signs if infection spreads
• Pus drainage if the abscess ruptures

Diagnosis

Diagnosis involves a physical examination to assess bursal swelling, warmth, and tenderness. Imaging (e.g., ultrasound) may confirm fluid collection. Aspiration of the bursa to analyze fluid for infection is often performed to guide treatment.

Treatment Options

• Antibiotics (oral or intravenous) for bacterial infections
• Incision and drainage of the abscess to remove pus
• Warm compresses to promote drainage
• Pain management with analgesics
• Immobilization of the affected area to reduce discomfort

Prognosis and Follow-Up

With prompt treatment, most bursal abscesses resolve without complications. Follow-up may include monitoring for recurrence or residual swelling. Chronic or recurrent cases may require further evaluation for underlying causes.

Complications

• Spread of infection to surrounding tissues or bloodstream
• Chronic bursitis or bursal scarring
• Functional impairment due to pain or limited mobility
• Rarely, sepsis in severe or untreated cases

Lifestyle & Prevention

• Avoid trauma or excessive pressure on bursae
• Maintain good skin hygiene to prevent infection
• Use protective gear during activities with repetitive motion
• Manage chronic conditions (e.g., diabetes) to reduce infection risk

When to Seek Professional Help

Seek care if symptoms worsen, fever develops, or the abscess does not improve with initial measures. Immediate attention is needed for signs of spreading infection, such as increasing redness, swelling, or systemic illness.

Tips for Medical Coders

Code M71.00 is used for an abscess of an unspecified bursa. Documentation should specify the absence of a more precise site (e.g., shoulder, elbow) to support the unspecified designation. Include details on infection, drainage, or treatment to ensure accurate coding.