| Full description | Unspecified pre-existing diabetes mellitus in pregnancy, third trimester |
| Billable | Yes |
| Chapter | Chapter 15: Pregnancy, childbirth and the puerperium (O00-O9A) |
| Section | Other maternal disorders predominantly related to pregnancy (O20-O29) |
| Parent code | O24.31 — Unspecified pre-existing diabetes mellitus in pregnancy |