O42

Non-Billable
ChapterO00–O9A
Rankcategory
Official Description

Premature rupture of membranes

Metadata & Insights
  • Non-billable category (requires more specific sub-code).
  • Chapter 15: Pregnancy, Childbirth and the Puerperium (O00-O9A).

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.

Clinical Hierarchy

BillableHas subcodes
CH15Pregnancy, childbirth and the puerperium (O00-O9A)
O30-O48Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
O42Premature rupture of membranesNot billable
O42.0Premature rupture of membranes, onset of labor within 24 hours of ruptureSubcodes
O42.1Premature rupture of membranes, onset of labor more than 24 hours following ruptureSubcodes
O42.9Premature rupture of membranes, unspecified as to length of time between rupture and onset of laborSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to O42:

chapterCH15
Pregnancy, childbirth and the puerperium (O00-O9A)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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