2026 ICD-10-CM Diagnosis Code O00Ectopic pregnancy

ICD-10-CM Codes›O00-O9A›O00-O08›O00

ICD-10-CM O00
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O00 is a non-billable ICD-10-CM category code for ectopic pregnancy, so it cannot be submitted on claims. Use a more specific code from this category instead, such as O00.00, O00.01, O00.101, and O00.102.

Code Identity

ICD-10-CM Code
O00
Billable Status
No — Non-Billable Category
Code Describes
Ectopic pregnancy
Chapter
O00-O08
Pregnancy with abortive outcome

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO00-O08Pregnancy with abortive outcome
CategoryO00Ectopic pregnancy
This CodeO00Ectopic pregnancy

Specific Coding for Ectopic pregnancyOverview

Non-specific codes like O00 require more characters. Use one of these billable codes instead:

  • O00.0 for Abdominal pregnancy

  • Use O00.00 for Abdominal pregnancy without intrauterine pregnancy

  • Use O00.01 for Abdominal pregnancy with intrauterine pregnancy

  • O00.1 for Tubal pregnancy

  • O00.10 for Tubal pregnancy without intrauterine pregnancy

  • O00.11 for Tubal pregnancy with intrauterine pregnancy

  • O00.2 for Ovarian pregnancy

  • O00.20 for Ovarian pregnancy without intrauterine pregnancy

  • O00.21 for Ovarian pregnancy with intrauterine pregnancy

  • O00.8 for Other ectopic pregnancy

  • Use O00.80 for Other ectopic pregnancy without intrauterine pregnancy

  • Use O00.81 for Other ectopic pregnancy with intrauterine pregnancy

  • O00.9 for Ectopic pregnancy, unspecified

  • Use O00.90 for Unspecified ectopic pregnancy without intrauterine pregnancy

  • Use O00.91 for Unspecified ectopic pregnancy with intrauterine pregnancy

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • ruptured ectopic pregnancy

Use Additional Code

  • code from category O08

Patient EducationClinical

Ectopic Pregnancy

The uterus, or womb, is the place where a fetus grows during pregnancy. In an ectopic pregnancy, the fertilized egg grows in the wrong place outside the uterus. It usually occurs in the fallopian tubes. These tubes carry eggs from the ovaries to the uterus.

The full article covers:

  • What is an ectopic pregnancy?
  • What increases my risk of an ectopic pregnancy?
  • What are the symptoms of an ectopic pregnancy?
  • How is an ectopic pregnancy diagnosed?
  • What is the treatment for an ectopic pregnancy?

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 O00Overview

Is O00 (Ectopic pregnancy) a billable code?

No. This is a category header that groups the codes for ectopic pregnancy, and headers cannot be submitted on claims. Claims for ectopic pregnancy need a more specific code from this category, such as O00.00, O00.01, and O00.101.