2027 ICD-10-CM Diagnosis Code O60.00Preterm labor without delivery, unspecified trimester

ICD-10-CM Codes›O00-O9A›O60-O77›O60

ICD-10-CM O60.00
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

O60.00 is a billable ICD-10-CM diagnosis code for preterm labor without delivery, unspecified 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. The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64). Coders also document this condition as premature labor. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Early or threatened labor.

Code Identity

ICD-10-CM Code
O60.00
Billable Status
Yes — Valid for Submission
Code Describes
Preterm labor without delivery, unspecified trimester
Short Description
Preterm labor without delivery, unspecified trimester
Same as the full description in the CMS dataset.
Parent Code
O60.0
Preterm labor without delivery

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO60-O77Complications of labor and delivery
CategoryO60Preterm labor
This CodeO60.00Preterm labor without delivery, unspecified trimester

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O60.00.

Maternity diagnoses
The Medicare Code Editor detects inconsistencies in maternity cases by checking a patient's age and any diagnosis on the patient's record. The maternity code edits apply to patients age ange is 9–64 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Premature labor
  • Premature uterine contraction
  • Preterm labor without delivery
  • Uterine contractions problem

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to O60.00: 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.

From O60 Preterm labor applies to 52 codes
  • 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.

From O60 Preterm labor applies to 52 codes
From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • 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.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • 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

Add a second code, after this one, to fully describe the condition.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • 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.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • 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 O60.00, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming O60.00: they are not reported together with it, unless the two conditions are unrelated.

  • O47 False labor
    preterm labor (O60.-) names O60.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR PRG011
Early or threatened labor
Default principal diagnosis: inpatient Yes · outpatient Yes

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 O60.00 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
644.00 Threat prem labor-unspec
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About O60.00Overview

What is the ICD-10 code for preterm labor without delivery, unspecified trimester?

The ICD-10-CM code for preterm labor without delivery, unspecified trimester is O60.00 (sometimes written as O6000). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is O60.00 (Preterm labor without delivery) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report preterm labor without delivery, unspecified trimester on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does O60.00 group to?

When preterm labor without delivery, unspecified 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.

Who can O60.00 be reported for?

The Medicare Code Editor checks preterm labor without delivery, unspecified trimester against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.

Can O60.00 be reported with a code from O47.0?

Not as a rule. The Excludes1 note at O60, which applies to O60.00, lists "false labor (O47.0-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).