KA65.3

ICD-11 MMS 2026-01

Neonatal infectious mastitis

Description

A disease of the breasts in neonates, may be caused by a maternal infection with a bacterial source. This disease is characterised by swelling, erythema, warmth, tenderness, induration of the breast, or purulent discharge from the nipple. It is usually unilateral. This disease may also present with breast abscesses.

Coding note from above levels

Conditions arising in the perinatal period, even though death or morbidity occurs later, should, as far as possible, be coded to chapter 19, which takes precedence over chapters containing codes for diseases by their anatomical site. For children less than 28 days old, assume that a reported condition developed in the perinatal period, unless the duration is stated and the onset was after the first completed week of life.

Index terms

  • Neonatal infectious mastitis
  • infective mastitis of newborn
  • neonatal breast abscess
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  • newborn breast abscess

Excludes

  • KC41.0 – noninfective mastitis of newborn

Exclusions from above levels

  • 1C62.0 – Asymptomatic human immunodeficiency virus infection
  • http://id.who.int/icd/entity/1000704511 – human immunodeficiency virus [HIV] disease
  • http://id.who.int/icd/entity/588616678 – Gastroenteritis or colitis of infectious origin
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  • http://id.who.int/icd/entity/609214049 – congenital gonococcal infection
  • MA14.0 – Laboratory evidence of human immunodeficiency virus
  • 01 – Certain infectious or parasitic diseases - acquired after birth
  • 02 – Neoplasms
  • 05 – Endocrine, nutritional or metabolic diseases
  • 08 – Certain congenital diseases of the nervous system
  • 20 – Congenital malformations, deformations and chromosomal abnormalities
  • 22 – Injury, poisoning or certain other consequences of external causes
  • 3A10 – Hereditary haemolytic anaemia
  • 4A01.03 – Transient hypogammaglobulinaemia of infancy
  • 9B71.3 – Retinopathy of prematurity
  • BC43 – congenital cardiomyopathy
  • DA93.0 – Paralytic ileus
  • EA50.Z – Pemphigus neonatorum
  • EH40.00 – Cradle cap

Sibling codes

  • KA65.0 – Neonatal conjunctivitis or dacryocystitis
  • KA65.1 – Omphalitis of newborn
  • KA65.2 – Neonatal urinary tract infection
  • KA65.4 – Neonatal meningitis
  • KA65.Y – Neonatal infections of other specified sites

Foundation entity

Neonatal infectious mastitis – http://id.who.int/icd/entity/1880920858

Allowed postcoordination axes

Part of: KA65: Neonatal infections of certain specified sites › 19: Certain conditions originating in the perinatal period