U.S. ICD-10-CM · FY 2027

O42 ICD-10-CM Code: Premature rupture of membranes

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

O42

Premature rupture of membranes

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where O42 sits

  1. 1

    Chapter 15

    Pregnancy, childbirth and the puerperium (O00-O9A)

  2. 2

    Section

    Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)

  3. 3

    Category O42

    Premature rupture of membranes

  4. 4

    Code O42

    Premature rupture of membranes

More specific choices

Codes under O42

O42 is a non-billable category. Choose the child code that best matches the documented diagnosis.

O42.0

Premature rupture of membranes, onset of labor within 24 hours of rupture

O42.1

Premature rupture of membranes, onset of labor more than 24 hours following rupture

O42.9

Premature rupture of membranes, unspecified as to length of time between rupture and onset of labor

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for O42.

Code first

No “code first” instruction is listed for O42.

Use additional code

No “use additional code” instruction is listed for O42.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for O42.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for O42.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code O42 mean?

O42 is the FY 2027 U.S. ICD-10-CM code for “Premature rupture of membranes.”

Is O42 a billable or specific ICD-10-CM code?

No. O42 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is O42 located in ICD-10-CM?

O42 is listed in Chapter 15, Pregnancy, childbirth and the puerperium (O00-O9A), within Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48) (O30–O48), under category O42, Premature rupture of membranes.

What coding notes are listed for O42?

No inclusion terms are listed for O42 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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