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ICD-10-CM 2027 diagnosis code

O03Spontaneous abortion

Not billable — use a more specific code

O03 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About O03

O03 is the ICD-10-CM diagnosis code for spontaneous abortion. It belongs to block O00-O08 (pregnancy with abortive outcome) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: O03.0 (abortion), O03.1 (abortion), O03.2 (abortion), O03.3 (abortion), O03.4 (complication), O03.5 (abortion), O03.6 (abortion), O03.7 (abortion) and 2 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under O03

Coding notes

Note
  • Incomplete abortion includes retained products of conception following spontaneous abortion
IncludesFurther defines the content of the category
  • miscarriage

Notes that apply from higher levels

Instructions written at a parent level also apply to O03.

Broader instructions also apply from O00-O08 Pregnancy with abortive outcome and Chapter 15: Pregnancy, childbirth and the puerperium.

Codes whose notes reference O03

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about O03

Is O03 billable?

No. O03 is a header code. Report one of its more specific subcodes instead.