All ICD10 Codes
O21Non-billable

Excessive vomiting in pregnancy

Pregnancy, Childbirth and the Puerperium·Other maternal disorders predominantly related to pregnancy (O20-O29)·category·FY 2026

Use a more specific code (5 billable)
O21.0Mild hyperemesis gravidarumO21.1Hyperemesis gravidarum with metabolic disturbanceO21.2Late vomiting of pregnancyO21.8Other vomiting complicating pregnancyO21.9Vomiting of pregnancy, unspecified

CH15 Parent Instructions

Excludes1(Not coded here. Use a different code.)
  • supervision of normal pregnancy (Z34.-)
Excludes2(Not included here. Code separately if applicable.)
  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)
Use Additional Code
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

O20-O29 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
  • maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)

Clinical Hierarchy

BillableHas subcodes
CH15Pregnancy, childbirth and the puerperium (O00-O9A)
O20-O29Other maternal disorders predominantly related to pregnancy (O20-O29)
O21Excessive vomiting in pregnancyNot billable
O21.0Mild hyperemesis gravidarumBillable
O21.1Hyperemesis gravidarum with metabolic disturbanceBillable
O21.2Late vomiting of pregnancyBillable
O21.8Other vomiting complicating pregnancyBillable
O21.9Vomiting of pregnancy, unspecifiedBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.