2027 ICD-10-CM Diagnosis Code O60.02Preterm labor without delivery, second trimester
ICD-10-CM Codes›O00-O9A›O60-O77›O60
- Billable — Valid for Submission
- MCC — Major Complication or Comorbidity
- Not Chronic
O60.02 is a billable ICD-10-CM diagnosis code for preterm labor without delivery, second trimester. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 817 through 819, 831 through 833. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 277 closely related codes. The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Early or threatened labor.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for O60.02.
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to O60.02: its own notes plus those printed at O60 and Chapter 15. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- onset (spontaneous) of labor before 37 completed weeks of gestation
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- supervision of normal pregnancy (Z34.-)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Notes
General instructions on how these codes are used.
- CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
- Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
- Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
- 1st trimester- less than 14 weeks 0 days
- 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
- 3rd trimester- 28 weeks 0 days until delivery
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name O60.02, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Pregnancy (single) (uterine) See Also: Delivery and Puerperal; Z33.1
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Obstetric Labor, Premature
onset of obstetric labor before term (term birth) but usually after the fetus has become viable. in humans, it occurs sometime during the 29th through 38th week of pregnancy. tocolysis inhibits premature labor and can prevent the birth of premature infants (infant, premature).
Patient EducationClinical
Preterm Labor
Preterm labor is labor that starts before 37 completed weeks of pregnancy. It can lead to premature birth. Premature babies may face serious health risks.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert O60.02 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About O60.02Overview
What is the ICD-10 code for preterm labor without delivery, second trimester?
The ICD-10-CM code for preterm labor without delivery, second trimester is O60.02 (sometimes written as O6002). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is O60.02 (Preterm labor without delivery) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report preterm labor without delivery, second trimester on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does O60.02 group to?
When preterm labor without delivery, second trimester is the principal diagnosis on an inpatient stay, it groups to MS-DRG 833, 832, 831, 819, 818, 817, with relative weights from 0.5000 to 1.7586 depending on complications. Higher weights mean higher Medicare reimbursement.
Is O60.02 a CC or MCC?
CMS lists O60.02 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 277 closely related codes in its exclusion list.
Who can O60.02 be reported for?
The Medicare Code Editor checks preterm labor without delivery, second trimester against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.
