| O00-O08 | Pregnancy with abortive outcome |
| O09 | Supervision of high risk pregnancy |
| O10-O16 | Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium |
| O20-O29 | Other maternal disorders predominantly related to pregnancy |
| O30-O48 | Maternal care related to the fetus and amniotic cavity and possible delivery problems |
| O60-O77 | Complications of labor and delivery |
| O80-O82 | Encounter for delivery |
| O85-O92 | Complications predominantly related to the puerperium |
| O94-O9A | Other obstetric conditions, not elsewhere classified |
