2026 ICD-10-CM Diagnosis Code O66Other obstructed labor

ICD-10-CM Codes›O00-O9A›O60-O77›O66

ICD-10-CM O66
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O66 is a non-billable ICD-10-CM category code for other obstructed labor, so it cannot be submitted on claims. Use a more specific code from this category instead, such as O66.0, O66.1, O66.2, and O66.3.

Code Identity

ICD-10-CM Code
O66
Billable Status
No — Non-Billable Category
Code Describes
Other obstructed labor
Chapter
O60-O77
Complications of labor and delivery

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO60-O77Complications of labor and delivery
CategoryO66Other obstructed labor
This CodeO66Other obstructed labor

Specific Coding for Other obstructed laborOverview

Non-specific codes like O66 require more characters. Use one of these billable codes instead:

  • Use O66.0 for Obstructed labor due to shoulder dystocia

  • Use O66.1 for Obstructed labor due to locked twins

  • Use O66.2 for Obstructed labor due to unusually large fetus

  • Use O66.3 for Obstructed labor due to other abnormalities of fetus

  • O66.4 for Failed trial of labor

  • Use O66.40 for Failed trial of labor, unspecified

  • Use O66.41 for Failed attempted vaginal birth after previous cesarean delivery

  • Use O66.5 for Attempted application of vacuum extractor and forceps

  • Use O66.6 for Obstructed labor due to other multiple fetuses

  • Use O66.8 for Other specified obstructed labor

  • Use O66.9 for Obstructed labor, unspecified

Clinical InformationClinical

  • Obstructed Labor

    a physical barrier to the natural delivery of a baby.

Patient EducationClinical

Childbirth Problems

Childbirth is the process of giving birth to a baby. It includes labor and delivery. Usually everything goes well, but problems can happen. They may cause a risk to the mother, baby, or both. Some of the more common childbirth problems include:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

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 O66Overview

Is O66 (Other obstructed labor) a billable code?

No. This is a category header that groups the codes for other obstructed labor, and headers cannot be submitted on claims. Claims for other obstructed labor need a more specific code from this category, such as O66.0, O66.1, and O66.2.