| Full description | Quadruplet pregnancy with two or more monochorionic fetuses, unspecified trimester |
| Billable | Yes |
| Chapter | Chapter 15: Pregnancy, childbirth and the puerperium (O00-O9A) |
| Section | Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48) |
| Parent code | O30.21 — Quadruplet pregnancy with two or more monochorionic fetuses |