N64.0 Fissure and fistula of nipple

Name of the Condition

• Fissure and fistula of nipple (ICD-10-CM Code: N64.0)

Summary

Fissure and fistula of the nipple refers to a condition where the nipple develops a crack (fissure) or an abnormal passage (fistula) connecting to another tissue or surface. This may result from trauma, infection, or underlying inflammatory processes. The condition can cause discomfort and may affect breastfeeding.

Causes

Physical trauma to the nipple (e.g., from breastfeeding, improper latch, or injury) Infection, such as mastitis or abscess formation. Chronic inflammation or irritation. Underlying conditions like duct ectasia or fistula formation.

Risk Factors

• Breastfeeding, especially with poor latch technique or nipple trauma
• History of nipple injury or surgery
• Inflammatory breast conditions
• Immunocompromised states

Symptoms

• Pain or tenderness in the nipple
• Visible crack or split in the nipple (fissure)
• Discharge from the nipple or fistula opening
• Redness or swelling around the affected area

Diagnosis

Physical examination of the nipple and surrounding tissue. Review of patient history, including breastfeeding practices or trauma. Imaging (e.g., ultrasound) if a fistula or underlying abscess is suspected. Cultures or swabs to identify infection.

Treatment Options

• Topical ointments or creams to promote healing and reduce pain
• Antibiotics if infection is present
• Proper breastfeeding technique adjustments to prevent further trauma
• Surgical intervention for persistent or complex fistulas

Prognosis and Follow-Up

Most fissures heal with proper care, but fistulas may require longer management. Follow-up ensures resolution and prevents recurrence. Monitoring for infection or complications is important.

Complications

• Chronic pain or discomfort
• Infection spreading to surrounding tissue
• Difficulty with breastfeeding
• Persistent fistula requiring surgical repair

Lifestyle & Prevention

• Maintain proper breastfeeding technique to avoid nipple trauma
• Keep the nipple clean and dry to reduce infection risk
• Use lanolin or other nipple protectants if needed
• Address any underlying inflammatory conditions promptly

When to Seek Professional Help

• If pain is severe or worsening
• If discharge is bloody, pus-like, or persistent
• If the fissure or fistula does not improve with home care
• If signs of infection (e.g., fever, redness, swelling) develop

Tips for Medical Coders

• Code N64.0 is specific to fissure and fistula of the nipple. Documentation should clearly describe the presence of a fissure (crack) or fistula (abnormal passage) and any associated symptoms or causes. Ensure the diagnosis aligns with clinical findings to support accurate coding.