L02.222 Furuncle of back [any part, except buttock]

Name of the Condition

• Furuncle of back [any part, except buttock]
• Also known as a boil or abscess of the back (excluding buttock)

Summary

A furuncle, commonly referred to as a boil, is a painful, pus-filled bump that forms under the skin due to a bacterial infection usually involving a hair follicle. When occurring on the back (excluding the buttock), it is termed a "Furuncle of back [any part, except buttock]."

Causes

Typically caused by the bacterium Staphylococcus aureus. Can develop due to bacteria entering the hair follicle through cuts, scrapes, or other breaks in the skin.

Risk Factors

• Poor hygiene
• Close contact with others who have boils
• Compromised immune system
• Diabetes
• Wearing tight or non-breathable clothing that irritates the skin

Symptoms

• Reddish, swollen bump on the back (excluding buttock)
• Pain and tenderness in the affected area
• Pus or drainage from the boil
• Itching before the boil forms

Diagnosis

Mainly through physical examination. Swab of the pus to identify the specific bacteria, if recurring infections occur.

Treatment Options

• Warm compresses to help the boil open and drain naturally
• Incision and drainage performed by a healthcare professional in severe cases
• Antibiotics if there is a concern of a spreading infection

Prognosis and Follow-Up

With proper treatment, furuncles typically resolve without complications. Recurrences can be minimized with proper hygiene and, if necessary, addressing underlying risk factors.

Complications

• Spread of infection to surrounding skin or deeper tissues
• Formation of a carbuncle (cluster of boils)
• Scarring at the site of the furuncle
• Systemic infection (rare, but possible in immunocompromised individuals)

Lifestyle & Prevention

• Maintain good hygiene, especially after sweating or exercise.
• Avoid sharing personal items (e.g., towels, razors) that may spread bacteria.
• Wear loose, breathable clothing to reduce skin irritation.
• Keep skin clean and dry, particularly in areas prone to friction.

When to Seek Professional Help

• If the boil is large, painful, or does not improve with home care.
• If there is fever, chills, or signs of spreading infection (e.g., red streaks, increased swelling).
• If the boil recurs frequently or affects multiple areas.
• If you have a weakened immune system or underlying conditions like diabetes.

Tips for Medical Coders

Document the specific location (back, excluding buttock) and confirm the diagnosis of a furuncle. Ensure the code L02.222 is used when the furuncle is on the back (any part, except buttock) and not elsewhere. Include details about the lesion’s appearance, drainage, or treatment if relevant to support coding accuracy.