| Full description | Diseases of the respiratory system complicating pregnancy, unspecified trimester |
| Billable | Yes |
| Chapter | Chapter 15: Pregnancy, childbirth and the puerperium (O00-O9A) |
| Section | Other obstetric conditions, not elsewhere classified (O94-O9A) |
| Parent code | O99.51 — Diseases of the respiratory system complicating pregnancy |