All ICD10 Codes
O03Not billable, use a more specific code below

Spontaneous abortion

In Pregnancy with abortive outcome (O00-O08), chapter 15: Pregnancy, Childbirth and the Puerperium

28 billable codes under O03: 5 are an MCC, 19 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

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Instructional notes

Includes: conditions that are coded here

  • miscarriage

Also applies, from Pregnancy with abortive outcome (O00-O08)

These notes sit on O00-O08 and apply to every code under it, including O03.

Excludes1: not coded here, use a different code

  • continuing pregnancy in multiple gestation after abortion of one fetus or more (O31.1-, O31.3-)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Coding of obstetric cases with O00-O9A codes: sequencing priority, trimester and fetus characters, principal diagnosis selection, delivery outcome, and pregnancy-related complications.

Read Section I.C.15 (page 63), 11 more topics

All codes under O03

O03 can't be used on a claim. Pick a billable code below; grey headings group them.

O03 MS-DRGs

As the principal diagnosis, all 28 billable codes under O03 group to MS-DRG 770 or 779 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to O03

Notes on these codes point to O03.

  • Z33.2 Excludes1: spontaneous abortion (O03)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

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.

Read more about miscarriage on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.