O00 Ectopic pregnancy
The ICD-10-CM code for Ectopic pregnancy is O00 (FY2026). It is a non-billable category code — select a more specific code below for claims.
Classification
- Section
- O00-O08: Pregnancy with abortive outcome (O00-O08)
- Category O00
- 28 codes (18 billable)
- FY2026 Status
- Stable since FY2024
Official Coding Guidelines
Chapter 15 codes & sequencing priority; incidental pregnancy Z33.11) Codes from chapter 15 and sequencing priority Obstetric cases require codes from chapter 15, codes in the range O00- O9A, Pregnancy, Childbirth, and the Puerperium. Chapter 15 codes have sequencing priority over codes from other chapters. Additional codes from other chapters may be used in conjunction with chapter 15 codes to further specify conditions. Should the provider document that the pregnancy is incidental to the encounter, then code Z33.1, Pregnant state, incidental, should be used in place of any chapter 15 codes. It is the provider’s responsibility to state that the condition being treated is not affecting the pregnancy.
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