O42

⚠ Non-billable (Header)

Premature rupture of membranes

Pregnancy, childbirth and the puerperium (O00-O9A)

⚠️ This is a category header code — not billable. Use a more specific child code below.

✓ No additional coding notes for O42

Child Codes (3)

O42.0Premature rupture of membranes, onset of labor within 24 hours of ruptureHeader O42.1Premature rupture of membranes, onset of labor more than 24 hours following ruptureHeader O42.9Premature rupture of membranes, unspecified as to length of time between rupture and onset of laborHeader

Clinical Description

ICD-10-CM code O42 represents premature rupture of membranes. This code falls under the Pregnancy, childbirth and the puerperium (O00-O9A) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

Frequently Asked Questions

What is ICD-10 code O42?

ICD-10-CM code O42 is "Premature rupture of membranes". It belongs to the category: Pregnancy, childbirth and the puerperium (O00-O9A).

Is O42 a billable ICD-10 code?

No, O42 is a non-billable header code. A more specific child code must be used for billing.

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Code Information

CodeO42

BillableNo — Header code

CategoryPregnancy, childbirth and the puerperium (O00-O9A)

Excludes10 rule(s)

Excludes20 note(s)

Child codes3

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)