KA21.2

ICD-11 MMS 2026-01

Low birth weight of newborn

Description

A paediatric condition in which the infant is born weighing between 1500 and 2499 g.

Coding note from above levels

When both birth weight and gestational age are available, priority of assignment should be given to birth weight.

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.

Exclusions from above levels

  • KA20 – Disorders of newborn related to slow fetal growth or fetal malnutrition
  • 01 – Certain infectious or parasitic diseases - acquired after birth
  • 02 – Neoplasms
Show allHide
  • 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
  • http://id.who.int/icd/entity/588616678 – Gastroenteritis or colitis of infectious origin
  • http://id.who.int/icd/entity/609214049 – Congenital gonococcal infection

Child codes

  • KA21.20 – Low birth weight of newborn, 1500-1999g
  • KA21.21 – Low birth weight of newborn, 2000-2499g
  • KA21.2Z – Low birth weight of newborn, unspecified

Sibling codes

  • KA21.0 – Extremely low birth weight of newborn
  • KA21.1 – Very low birth weight of newborn
  • KA21.3 – Extreme prematurity of newborn
  • KA21.4 – Preterm newborn

Foundation entity

Low birth weight of newborn – http://id.who.int/icd/entity/2041060050

Part of: KA21: Disorders of newborn related to short gestation or low birth weight, not elsewhere classified › 19: Certain conditions originating in the perinatal period