O02.1 Missed abortion
The ICD-10-CM code for Missed abortion is O02.1 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- O00-O08: Pregnancy with abortive outcome (O00-O08)
- Category O02
- 7 codes (5 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to O02.1:
- Missed › abortion
- Abortion (complete) (spontaneous) › missed
- Dead › fetus, retained (mother) › early pregnancy
- Retention › products of conception › early pregnancy (dead fetus)
- Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › missed › abortion
- Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › death of fetus (near term) › early pregnancy
- Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › intrauterine fetal death (near term) › early pregnancy
- Delivery (childbirth) (labor) › complicated › by › intrauterine fetal death, early
Inclusion Terms
- Early fetal death, before completion of 20 weeks of gestation, with retention of dead fetus
U.S. Hospital Utilization
- An estimated 8,775 U.S. inpatient stays in 2023 included O02.1 among the documented diagnoses.
- 7,760 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
Z3A—do not assign for O00-O08, Z33.2, or postpartum conditionsCategory Z3A codes should not be assigned for pregnancies with abortive outcomes (categories O00- O08), elective termination of pregnancy (code Z33.2), nor for postpartum conditions, as category Z3A is not applicable to these conditions.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026