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KA21.3 Extreme prematurity of newborn

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

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

sections/codes in this section (KA21.3-KA21.3)

• Extreme prematurity of newborn, gestational age less than 22 completed weeks  (KA21.30)
• Extreme prematurity of newborn, gestational age 22 completed weeks  (KA21.31)
• Extreme prematurity of newborn, gestational age 23 completed weeks  (KA21.32)
• Extreme prematurity of newborn, gestational age 24 completed weeks  (KA21.33)
• Extreme prematurity of newborn, gestational age 25 completed weeks  (KA21.34)
• Extreme prematurity of newborn, gestational age 26 completed weeks  (KA21.35)
• Extreme prematurity of newborn, gestational age 27 completed weeks  (KA21.36)
• Extreme prematurity of newborn, unspecified  (KA21.3Z)

coding note

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

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