M71.079 Abscess of bursa, unspecified ankle and foot

Name of the Condition

• Abscess of bursa, unspecified ankle and foot

Summary

An abscess of the bursa, unspecified ankle and foot is a localized collection of pus within a bursa in the ankle or foot region. This condition causes pain, swelling, and functional impairment at the affected site. Bursae are small fluid-filled sacs that reduce friction between tissues, and when infected, they can become inflamed and filled with purulent material.

Causes

Abscesses of the bursa typically 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 chronic inflammation or foreign body reaction, may also lead to bursal abscess formation.

Risk Factors

• Recent injury or surgery near a bursa in the ankle or foot
• 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 abscess ruptures

Diagnosis

Diagnosis involves a physical examination to assess bursal characteristics, including tenderness, fluctuance, and warmth. Imaging (e.g., ultrasound or MRI) may be used to confirm the presence of an abscess and evaluate surrounding structures. Aspiration of the bursa may be performed to identify the causative organism and guide antibiotic therapy.

Treatment Options

Treatment typically includes antibiotic therapy to address the underlying infection. Drainage of the abscess, either through aspiration or surgical intervention, may be necessary to relieve symptoms and promote healing. Rest, elevation, and pain management are also important components of care. In some cases, surgical debridement may be required to remove necrotic tissue or address complications.

Prognosis and Follow-Up

With appropriate treatment, most bursal abscesses resolve without long-term complications. Follow-up care is important to monitor for recurrence or the development of chronic bursitis. Patients should be advised to avoid activities that may exacerbate the condition and to seek prompt care if symptoms worsen or return.

Complications

Untreated or inadequately treated abscesses can lead to the spread of infection to adjacent tissues or the bloodstream, resulting in sepsis. Chronic bursitis or persistent pain may occur if the abscess is not fully resolved. Scarring or limited mobility may also be long-term consequences.

Lifestyle & Prevention

Preventive measures include avoiding repetitive trauma or pressure on the bursa, maintaining good skin hygiene, and promptly treating any skin infections or wounds in the ankle or foot area. Proper footwear and ergonomic practices can reduce the risk of bursal irritation. Immunocompromised individuals should take extra precautions to avoid infections.

When to Seek Professional Help

Seek medical attention if you experience persistent pain, swelling, or redness in the ankle or foot, especially if accompanied by fever or pus drainage. Early intervention can prevent complications and improve outcomes. Prompt care is particularly important for individuals with underlying health conditions that may impair healing.

Tips for Medical Coders

This code (M71.079) is specific to an abscess of the bursa in the unspecified ankle and foot. Documentation should clearly indicate the location (unspecified ankle/foot) and the presence of an abscess. Ensure the medical record supports the diagnosis, including clinical findings and any imaging or aspiration results. Avoid using this code if the location is specified (e.g., right or left) or if the condition is not an abscess.