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O21

Excessive vomiting in pregnancy

O21.0

Mild hyperemesis gravidarum

• Hyperemesis gravidarum, mild or unspecified, starting before the end of the 20th week of gestation

O21.1

Hyperemesis gravidarum with metabolic disturbance

• Hyperemesis gravidarum, starting before the end of the 20th week of gestation, with metabolic disturbance such as carbohydrate depletion
• Hyperemesis gravidarum, starting before the end of the 20th week of gestation, with metabolic disturbance such as dehydration
• Hyperemesis gravidarum, starting before the end of the 20th week of gestation, with metabolic disturbance such as electrolyte imbalance

O21.2

Late vomiting of pregnancy

• Excessive vomiting starting after 20 completed weeks of gestation

O21.8

Other vomiting complicating pregnancy

• Vomiting due to diseases classified elsewhere, complicating pregnancy

O21.9

Vomiting of pregnancy, unspecified