L02.92 Furuncle, unspecified

Name of the Condition

• Furuncle, Unspecified

Summary

A furuncle, also known as a boil, is a localized skin infection involving a hair follicle and surrounding tissue. It appears as a painful, red, swollen nodule that may develop a central pus-filled core. This condition results from bacterial invasion, typically causing inflammation and pus accumulation.

Causes

Furuncles are primarily caused by bacterial infections, most commonly Staphylococcus aureus. The infection occurs when bacteria enter the skin through breaks, such as minor cuts, hair follicle blockages, or other skin disruptions, leading to localized inflammation and pus formation.

Risk Factors

• Poor hygiene practices
• Close contact with infected individuals or contaminated surfaces
• Weakened immune system (e.g., diabetes, immunosuppressive conditions)
• Pre-existing skin conditions (e.g., acne, eczema)
• Skin trauma or friction

Symptoms

• Painful, red, raised lump on the skin
• Swelling and warmth around the affected area
• Pus-filled center (may drain spontaneously)
• Possible fever or general discomfort in severe cases

Diagnosis

Diagnosis is typically made through a physical examination by a healthcare provider. In some cases, a sample of the pus may be cultured to identify the causative bacteria, especially if the infection is recurrent or severe.

Treatment Options

• Warm compresses to promote drainage
• Incision and drainage for larger or persistent lesions
• Antibiotic therapy if the infection is widespread or associated with systemic symptoms
• Pain management with over-the-counter medications

Prognosis and Follow-Up

With appropriate treatment, furuncles generally resolve within 1–2 weeks. Follow-up may be recommended if the infection recurs, worsens, or does not improve with initial care. Proper hygiene and wound care help prevent recurrence.

Complications

• Spread of infection to surrounding tissues (cellulitis)
• Formation of deeper abscesses or carbuncles
• Systemic infection (rare, in immunocompromised individuals)

Lifestyle & Prevention

• Maintain good personal hygiene, including regular handwashing
• Avoid sharing personal items (e.g., towels, razors)
• Keep skin clean and dry, especially after sweating or injury
• Promptly treat minor skin injuries to prevent bacterial entry

When to Seek Professional Help

Seek medical attention if the furuncle is large, painful, or does not improve with home care, or if symptoms such as fever, increasing redness, or swelling occur. Immediate care is advised for lesions near the face, spine, or groin.

Tips for Medical Coders

When coding for L02.92 (Furuncle, unspecified), ensure documentation specifies the location and severity if available. Note whether the furuncle is uncomplicated or associated with complications (e.g., cellulitis) to support accurate code assignment. Verify that the diagnosis aligns with clinical findings and that no more specific code (e.g., by location) is applicable.