2021 ICD-10-CM Code O42.9

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

Version 2021

Not Valid for Submission

O42.9 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of premature rupture of membranes, unspecified as to length of time between rupture and onset of labor. The code is not specific and is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Unspecified diagnosis codes like O42.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

ICD-10:O42.9
Short Description:Premature ROM, unsp time betw rupture and onset of labor
Long Description:Premature rupture of membranes, unspecified as to length of time between rupture and onset of labor

Code Classification

Specific Coding for Premature ROM, unsp time betw rupture and onset of labor

Non-specific codes like O42.9 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for premature rom, unsp time betw rupture and onset of labor:

  • BILLABLE CODE - Use O42.90 for Premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, unspecified weeks of gestation
  • NON-BILLABLE CODE - O42.91 for Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor
  • BILLABLE CODE - Use O42.911 for Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, first trimester
  • BILLABLE CODE - Use O42.912 for Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, second trimester
  • BILLABLE CODE - Use O42.913 for Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, third trimester
  • BILLABLE CODE - Use O42.919 for Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, unspecified trimester
  • BILLABLE CODE - Use O42.92 for Full-term premature rupture of membranes, unspecified as to length of time between rupture and onset of labor

Information for Patients


Childbirth Problems

While childbirth usually goes well, complications can happen. They can cause a risk to the mother, baby, or both. Possible complications include

For some of these problems, the baby may need to be delivered surgically by a Cesarean section.


[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)