O21.1

ICD-10-CM Coding Rules

• O21.1

• O21.1

Applicable To

• 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

Approximate Synonyms

• Hyperemesis gravidarum excessive vomiting in pregnancy), severe

• Hyperemesis gravidarum severe vomiting in pregnancy) with metabolic disturbance

• Severe hyperemesis gravidarum

Details

• O21.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

• The 2023 edition of ICD-10-CM O21.1 became effective on October 1, 2022.

• This is the American ICD-10-CM version of O21.1 – other international versions of ICD-10 O21.1 may differ.