KA21.4
category
Preterm newborn
Definition
Preterm: is less than 37 completed weeks (less than 259 days) of gestation.
Coding note
When both birth weight and gestational age are available, priority of assignment must be given to gestational age.
10 subordinate codes
KA21.40Preterm newborn, gestational age 28 completed weeksKA21.41Preterm newborn, gestational age 29 completed weeksKA21.42Preterm newborn, gestational age 30 completed weeksKA21.43Preterm newborn, gestational age 31 completed weeksKA21.44Preterm newborn, gestational age 32 completed weeksKA21.45Preterm newborn, gestational age 33 completed weeksKA21.46Preterm newborn, gestational age 34 completed weeksKA21.47Preterm newborn, gestational age 35 completed weeksKA21.48Preterm newborn, gestational age 36 completed weeks4B4ZDiseases of the immune system, unspecified