2026 ICD-10-CM Diagnosis Code O60.13X4Preterm labor second trimester with preterm delivery third trimester, fetus 4

ICD-10-CM Codes›O00-O9A›O60-O77›O60

ICD-10-CM O60.13X4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O60.13X4 is a billable ICD-10-CM diagnosis code for preterm labor second trimester with preterm delivery third trimester, fetus 4. The 7th character 4 identifies fetus 4 in a multiple gestation pregnancy. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). 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

ICD-10-CM Code
O60.13X4
Billable Status
Yes — Valid for Submission
Code Describes
Preterm labor second trimester with preterm delivery third trimester, fetus 4
Short Description
Preterm labor second tri w preterm del third tri, fetus 4
Parent Code
O60.13
Preterm labor second trimester with preterm delivery third trimester

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO60-O77Complications of labor and delivery
CategoryO60Preterm labor
This CodeO60.13X4Preterm labor second trimester with preterm delivery third trimester, fetus 4

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O60.13X4.

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).

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

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 O60.13X4 to ICD-9-CMHistory

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

ICD-9-CM
644.21 Early onset delivery-del
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About O60.13X4Overview

Is O60.13X4 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report preterm labor second trimester with preterm delivery third trimester, fetus 4 on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character 4 in O60.13X4 mean?

The final character 4 identifies the fetus in a multiple gestation pregnancy: this code reports preterm labor second trimester with preterm delivery third trimester for fetus 4.

Who can O60.13X4 be reported for?

The Medicare Code Editor checks preterm labor second trimester with preterm delivery third trimester, fetus 4 against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of O60.13X4?

Under the General Equivalence Mappings, preterm labor second trimester with preterm delivery third trimester, fetus 4 converts to ICD-9-CM 644.21 (early onset delivery-del). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.