ICD-10 Diagnosis Code O20.0

Threatened abortion

Diagnosis Code O20.0

ICD-10: O20.0
Short Description: Threatened abortion
Long Description: Threatened abortion
This is the 2017 version of the ICD-10-CM diagnosis code O20.0

Code Classification
  • Pregnancy, childbirth and the puerperium
    • Other maternal disorders predominantly related to pregnancy (O20-O29)
      • Hemorrhage in early pregnancy (O20)

Information for Medical Professionals

Code Edits
The following edits are applicable to this code:
Maternity diagnoses Additional informationCallout TooltipMaternity diagnoses
Maternity. Age range is 12–55 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).

Diagnoses for females only Additional informationCallout TooltipDiagnoses for females only
Diagnoses for females only.

Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Threatened abortion
  • Threatened abortion in first trimester
  • Threatened abortion in second trimester
  • Threatened abortion in third trimester

Index of Diseases and Injuries
References found for the code O20.0 in the Index of Diseases and Injuries:

Information for Patients


Also called: Spontaneous abortion

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

Factors that may contribute to miscarriage include

  • A genetic problem with the fetus
  • Problems with the uterus or cervix
  • Chronic diseases, such as polycystic ovary syndrome

Signs of a miscarriage include vaginal spotting, abdominal pain or cramping, and fluid or tissue passing from the vagina. Bleeding can be a symptom of miscarriage, but many women also have it in early pregnancy and don't miscarry. To be sure, contact your health care provider right away if you have bleeding.

Women who miscarry early in their pregnancy usually do not need any treatment. In some cases, there is tissue left in the uterus. Doctors use a procedure called a dilatation and curettage (D&C) or medicines to remove the tissue.

Counseling may help you cope with your grief. Later, if you do decide to try again, work closely with your health care provider to lower the risks. Many women who have a miscarriage go on to have healthy babies.

NIH: National Institute of Child Health and Human Development

  • D and C
  • HCG blood test - quantitative
  • Miscarriage
  • Miscarriage - threatened

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