Table 2.

Mapping Conditions to ICD-10 and ICD-11 Codes

Undernutrition Conditions	ICD-10 Code	ICD-11 Code
Severe wasting	E40–E43 E40 Kwashiorkor E41 Nutritional marasmus E42 Marasmic kwashiorkor E43 Severe wasting, not otherwise categorized	5B51a Wasting in infants, children, or adolescents XS25 (severe) or 5B52a Acute malnutrition in infants, children, or adolescents XS25 (severe)
	B22.2 Wasting syndrome in a child living with HIV infectionb	5B51a Wasting in infants, children, or adolescents XS25 (severe) or 5B52a Acute malnutrition in infants, children, or adolescents XS25 (severe)
Moderate wasting	E44.0	5B51a Wasting in infants, children, or adolescents XS0T (moderate) or 5B52a Acute malnutrition in infants, children, or adolescents XS0T (moderate)
	B22.2 HIV disease resulting in wasting syndromeb
Stunting	E45	5B53a Stunting in infants, children, or adolescents
SGA	P05 Slow fetal growth and fetal malnutrition	KA20 Disorders of newborn related to slow fetal growth or fetal malnutrition
LBW	P07 Disorders related to short gestation and LBW P07.0 ELBW P07.1 Other LBS P07.2 Extreme immaturity P07.3 Other preterm infants	KA21 Disorders of newborn related to short gestation or LBW, not elsewhere classified KA21.0 ELBW of newborn KA21.1 VLBW of newborn; KA21.2 LBW of newborn KA21.3 Extreme prematurity of newborn KA21.4 Preterm newborn

Abbreviations: ELBW, extremely low birth weight; HIV, human immunodeficiency virus; ICD-10 and ICD-11, International Statistical Classification of Diseases and Related Health Problems,10th and 11th revisions; LBW, low birth weight; SGA, small for gestational age; VLBW, very low birth weight.

^a ICD-11 has additional codes for designating severity: XS25 for severe and XS0T for moderate.

^b ICD-10 rules default to B22.2 for children living with HIV infection with wasting, while these conditions are recorded separately in ICD-11, except when HIV infection wasting syndrome is the appropriate diagnosis in which case 1C62.3 can be used.