Free Medical Coding > ICD10 CM > 2024 ICD-10-CM Codes > 2024 ICD-10-CM Codes O00-O9A – Pregnancy, childbirth and the puerperium (O00-O9A) > 2024 ICD-10-CM Codes O20-O29 – Other maternal disorders predominantly related to pregnancy (O20-O29) > 2024 ICD-10-CM Codes O21 – Excessive vomiting in pregnancy (O21)