O91.1 Abscess of breast associated with pregnancy, the puerperium and lactation

Name of the Condition

• Abscess of Breast Associated with Pregnancy, the Puerperium and Lactation (O91.1)

Summary

This condition involves a localized collection of pus within the breast tissue, occurring during pregnancy, the postpartum period (puerperium), or while breastfeeding. It typically results from a bacterial infection and may present as a painful, swollen mass. Prompt medical evaluation is necessary to prevent complications and guide appropriate treatment.

Causes

Abscesses usually develop when bacteria, such as Staphylococcus aureus, enter the breast tissue through a break in the skin or milk ducts. This can occur due to cracked nipples, blocked milk ducts, or inadequate milk drainage. Hormonal changes during pregnancy or lactation may also increase susceptibility to infection.

Risk Factors

• Cracked or damaged nipples during breastfeeding.
• Inadequate milk removal or engorgement.
• Previous breast infections or abscesses.
• Poor hygiene practices.
• Weakened immune system.

Symptoms

• Localized breast pain, swelling, or redness.
• Palpable, tender lump with fluctuance.
• Fever or chills.
• Nipple discharge or pus.
• Skin warmth or discoloration over the affected area.

Diagnosis

Diagnosis is based on clinical evaluation, including physical examination for signs of abscess formation. Ultrasound may be used to confirm the presence of a fluid collection and guide potential drainage. Cultures of breast discharge or aspirated fluid may identify the causative organism.

Treatment Options

Treatment often involves antibiotic therapy to address the underlying infection. For larger or persistent abscesses, incision and drainage may be necessary. Pain management and continued breastfeeding (if appropriate) are also part of the care plan.

Prognosis and Follow-Up

With prompt treatment, most abscesses resolve without long-term complications. Follow-up care ensures the infection has cleared and monitors for recurrence. Breastfeeding may continue during treatment, depending on the severity and location of the abscess.

Complications

• Spread of infection to surrounding tissue.
• Recurrent abscess formation.
• Mastitis or cellulitis.
• Rarely, systemic infection (sepsis) if left untreated.

Lifestyle & Prevention

• Maintain good nipple hygiene during lactation.
• Ensure proper breastfeeding technique to prevent nipple damage.
• Address engorgement promptly to reduce milk stasis.
• Seek early treatment for signs of infection.

When to Seek Professional Help

Consult a healthcare provider if you experience breast pain, swelling, fever, or a palpable lump. Immediate care is needed for signs of worsening infection, such as increasing pain, redness, or systemic symptoms.

Tips for Medical Coders

Document the association with pregnancy, puerperium, or lactation to support code assignment. Include details about abscess location, size, and any drainage procedures performed. Ensure clinical notes align with the diagnosis to justify code specificity.