R63.6
Underweight
ICD-10 code R63.6 for Underweight
Use additional code to identify body mass index (BMI), if known (Z68.-)
Excludes1: abnormal weight loss (R63.4)
anorexia nervosa (F50.0-)
malnutrition (E40-E46)
ICD-10 International Statistical Classification of Diseases and Related Health Problems 10th Revision