KC21.1

ICD-11 MMS 2026-01

Neonatal toxic erythema

Description

Neonatal toxic erythema is a common rash in neonates, appearing in up to half of newborns carried to term, usually between day 2-5 after birth; it does not occur outside the neonatal period and typically resolves within first two weeks of life. It is characterised by blotchy erythema with crops of evanescent small white or yellow papules or pustules. It is a benign condition and is thought to cause no discomfort to the baby.

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 toxic erythema
  • Neonatal erythema toxicum
  • Toxic erythema of the newborn

Inclusions

  • Neonatal erythema toxicum

Exclusions from above levels

  • 01 – Certain infectious or parasitic diseases - acquired after birth
  • 02 – Neoplasms
  • 05 – Endocrine, nutritional or metabolic diseases
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  • 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
  • http://id.who.int/icd/entity/588616678 – Gastroenteritis or colitis of infectious origin
  • http://id.who.int/icd/entity/609214049 – Congenital gonococcal infection

Sibling codes

  • KC21.0 – Neonatal acne
  • KC21.2 – Perianal dermatitis of the newborn
  • KC21.Y – Other specified inflammatory dermatoses of the newborn
  • KC21.Z – Inflammatory dermatoses of the newborn, unspecified

Foundation entity

Neonatal toxic erythema – http://id.who.int/icd/entity/852826092

Part of: KC21: Inflammatory dermatoses of the newborn › 19: Certain conditions originating in the perinatal period