KA21.3Level 4

Extreme prematurity of newborn

**Definition:** Less than 28 completed weeks (less than 196 completed days) of gestation.

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KA21.30Extreme prematurity of newborn, gestational age less than 22 completed weeks

KA21.31Extreme prematurity of newborn, gestational age 22 completed weeks

KA21.32Extreme prematurity of newborn, gestational age 23 completed weeks

KA21.33Extreme prematurity of newborn, gestational age 24 completed weeks

KA21.34Extreme prematurity of newborn, gestational age 25 completed weeks

KA21.35Extreme prematurity of newborn, gestational age 26 completed weeks

KA21.36Extreme prematurity of newborn, gestational age 27 completed weeks

KA21.3ZExtreme prematurity of newborn, unspecified

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