2026 ICD-10-CM Diagnosis Code O03Spontaneous abortion

ICD-10-CM Codes›O00-O9A›O00-O08›O03

ICD-10-CM O03
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O03 is a non-billable ICD-10-CM category code for spontaneous abortion, so it cannot be submitted on claims. Use a more specific code from this category instead, such as O03.0, O03.1, O03.2, and O03.30.

Code Identity

ICD-10-CM Code
O03
Billable Status
No — Non-Billable Category
Code Describes
Spontaneous abortion
Chapter
O00-O08
Pregnancy with abortive outcome

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO00-O08Pregnancy with abortive outcome
CategoryO03Spontaneous abortion
This CodeO03Spontaneous abortion

Specific Coding for Spontaneous abortionOverview

Non-specific codes like O03 require more characters. Use one of these billable codes instead:

  • Use O03.0 for Genital tract and pelvic infection following incomplete spontaneous abortion

  • Use O03.1 for Delayed or excessive hemorrhage following incomplete spontaneous abortion

  • Use O03.2 for Embolism following incomplete spontaneous abortion

  • O03.3 for Other and unspecified complications following incomplete spontaneous abortion

  • Use O03.30 for Unspecified complication following incomplete spontaneous abortion

  • Use O03.31 for Shock following incomplete spontaneous abortion

  • Use O03.32 for Renal failure following incomplete spontaneous abortion

  • Use O03.33 for Metabolic disorder following incomplete spontaneous abortion

  • Use O03.34 for Damage to pelvic organs following incomplete spontaneous abortion

  • Use O03.35 for Other venous complications following incomplete spontaneous abortion

  • Use O03.36 for Cardiac arrest following incomplete spontaneous abortion

  • Use O03.37 for Sepsis following incomplete spontaneous abortion

  • Use O03.38 for Urinary tract infection following incomplete spontaneous abortion

  • Use O03.39 for Incomplete spontaneous abortion with other complications

  • Use O03.4 for Incomplete spontaneous abortion without complication

  • Use O03.5 for Genital tract and pelvic infection following complete or unspecified spontaneous abortion

  • Use O03.6 for Delayed or excessive hemorrhage following complete or unspecified spontaneous abortion

  • Use O03.7 for Embolism following complete or unspecified spontaneous abortion

  • O03.8 for Other and unspecified complications following complete or unspecified spontaneous abortion

  • Use O03.80 for Unspecified complication following complete or unspecified spontaneous abortion

  • Use O03.81 for Shock following complete or unspecified spontaneous abortion

  • Use O03.82 for Renal failure following complete or unspecified spontaneous abortion

  • Use O03.83 for Metabolic disorder following complete or unspecified spontaneous abortion

  • Use O03.84 for Damage to pelvic organs following complete or unspecified spontaneous abortion

  • Use O03.85 for Other venous complications following complete or unspecified spontaneous abortion

  • Use O03.86 for Cardiac arrest following complete or unspecified spontaneous abortion

  • Use O03.87 for Sepsis following complete or unspecified spontaneous abortion

  • Use O03.88 for Urinary tract infection following complete or unspecified spontaneous abortion

  • Use O03.89 for Complete or unspecified spontaneous abortion with other complications

  • Use O03.9 for Complete or unspecified spontaneous abortion without complication

Tabular List NotesGuidance

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

Includes

  • miscarriage

  • Incomplete abortion includes retained products of conception following spontaneous abortion

Patient EducationClinical

Miscarriage

A miscarriage is an unexpected loss of pregnancy before the 20th week. Most miscarriages happen very early in the pregnancy, often before a woman even knows she is pregnant.

The full article covers:

  • What is a miscarriage?
  • What causes a miscarriage?
  • What are the signs of a miscarriage?
  • How is a miscarriage diagnosed?
  • What is the treatment for a miscarriage?
  • Can a miscarriage be prevented?

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 O03Overview

Is O03 (Spontaneous abortion) a billable code?

No. This is a category header that groups the codes for spontaneous abortion, and headers cannot be submitted on claims. Claims for spontaneous abortion need a more specific code from this category, such as O03.0, O03.1, and O03.2.