2027 ICD-10-CM Diagnosis Code O03Spontaneous abortion

ICD-10-CM Codes›O00-O9A›O00-O08›O03

ICD-10-CM O03
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Spontaneous abortion
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to O03: its own notes plus those printed at block O00-O08 and Chapter 15. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

  • miscarriage

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block O00-O08 Pregnancy with abortive outcome applies to 110 codes
  • continuing pregnancy in multiple gestation after abortion of one fetus or more (O31.1-, O31.3-)
From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • supervision of normal pregnancy (Z34.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Notes

General instructions on how these codes are used.

On O03 itself
  • Incomplete abortion includes retained products of conception following spontaneous abortion
From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • 1st trimester- less than 14 weeks 0 days
  • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • 3rd trimester- 28 weeks 0 days until delivery

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name O03, its category, or a range that includes it.

Excludes1 12

These codes carry an Excludes1 note naming O03: they are not reported together with it, unless the two conditions are unrelated.

  • Z33.2 Encounter for elective termination of pregnancy
    spontaneous abortion (O03)
  • G08 Intracranial and intraspinal phlebitis and thrombophlebitis
    abortion, ectopic or molar pregnancy (O00-O07, O08.7) names O00-O07, which includes this code
  • K65 Peritonitis
    peritonitis with or following abortion or ectopic or molar pregnancy (O00-O07, O08.0) names O00-O07, which includes this code
  • Block N70-N77 Inflammatory diseases of female pelvic organs
    abortion or ectopic or molar pregnancy (O00-O07, O08.0) names O00-O07, which includes this code
  • R34 Anuria and oliguria
    anuria and oliguria complicating abortion or ectopic or molar pregnancy (O00-O07, O08.4) names O00-O07, which includes this code
  • R55 Syncope and collapse
    shock complicating or following abortion or ectopic or molar pregnancy (O00-O07, O08.3) names O00-O07, which includes this code
  • R57 Shock, not elsewhere classified
    shock complicating or following ectopic or molar pregnancy (O00-O07, O08.3) names O00-O07, which includes this code
  • T79.0 Air embolism (traumatic)
    air embolism complicating abortion or ectopic or molar pregnancy (O00-O07, O08.2) names O00-O07, which includes this code
  • T79.1 Fat embolism (traumatic)
    abortion or ectopic or molar pregnancy (O00-O07, O08.2) names O00-O07, which includes this code
  • T79.4 Traumatic shock
    shock complicating abortion or ectopic or molar pregnancy (O00-O07, O08.3) names O00-O07, which includes this code
  • T81.1 Postprocedural shock
    shock following abortion or ectopic or molar pregnancy (O00-O07, O08.3) names O00-O07, which includes this code
  • T81.7 Vascular complications following a procedure, not elsewhere classified
    embolism complicating abortion or ectopic or molar pregnancy (O00-O07, O08.2) names O00-O07, which includes this code

Excludes2 6

These codes carry an Excludes2 note naming O03: its condition is not part of those codes, and both may be reported when the patient has both.

  • D65 Disseminated intravascular coagulation [defibrination syndrome]
    abortion or ectopic or molar pregnancy (O00-O07, O08.1) names O00-O07, which includes this code
  • D68 Other coagulation defects
    coagulation defects complicating abortion or ectopic or molar pregnancy (O00-O07, O08.1) names O00-O07, which includes this code
  • I26 Pulmonary embolism
    pulmonary embolism complicating abortion, ectopic or molar pregnancy (O00-O07, O08.2) names O00-O07, which includes this code
  • K72 Hepatic failure, not elsewhere classified
    hepatic failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.8) names O00-O07, which includes this code
  • Block N17-N19 Acute kidney failure and chronic kidney disease
    renal failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.4) names O00-O07, which includes this code
  • Block N30-N39 Other diseases of the urinary system
    abortion or ectopic or molar pregnancy (O00-O07, O08.8) names O00-O07, which includes this code

Code First 6

These codes say to code first a condition named in the note, and O03 is one of the conditions named.

  • I47 Paroxysmal tachycardia
    abortion or ectopic or molar pregnancy (O00-O07, O08.8) names O00-O07, which includes this code
  • I49 Other cardiac arrhythmias
    abortion or ectopic or molar pregnancy (O00-O07, O08.8) names O00-O07, which includes this code
  • I50 Heart failure
    heart failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.8) names O00-O07, which includes this code
  • I74 Arterial embolism and thrombosis
    embolism and thrombosis complicating abortion or ectopic or molar pregnancy (O00-O07, O08.2) names O00-O07, which includes this code
  • I80 Phlebitis and thrombophlebitis
    if applicable: phlebitis and thrombophlebitis complicating abortion, ectopic or molar pregnancy (O00-O07, O08.7) names O00-O07, which includes this code
  • I82 Other venous embolism and thrombosis
    abortion, ectopic or molar pregnancy (O00-O07, O08.7) names O00-O07, which includes this code

Clinical InformationClinical

  • Abortion, Spontaneous

    expulsion of the product of fertilization before completing the term of gestation and without deliberate interference.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About O03Overview

What is the ICD-10 code for spontaneous abortion?

O03 is the ICD-10-CM category for spontaneous abortion, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can O03 be reported with a code from O31.1?

Not as a rule. The Excludes1 note at block O00-O08, which applies to O03, lists "continuing pregnancy in multiple gestation after abortion of one fetus or more (O31.1-, O31.3-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).