ICD-10-CM 2027
ICD-10 code for cornual gestation or pregnancy
From the official ICD-10-CM alphabetic index entry “Cornual gestation or pregnancy”. Page updated September 29, 2026.
About coding cornual gestation or pregnancy
The ICD-10-CM code for cornual gestation or pregnancy is O00.51 (Cornual ectopic pregnancy without intrauterine pregnancy). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on O00.51.
Within O00.5, choose O00.51 (without intrauterine pregnancy) only when documentation doesn't support a more specific option: with intrauterine pregnancy (O00.52).
To report this condition, pick the subcode that matches the documentation: O00.511 (pregnancy), O00.512 (pregnancy) and O00.519 (pregnancy).
Use an additional code from category O08 to identify any associated complication.
More specific cornual gestation or pregnancy codes (official index)
- with intrauterine pregnancy O00.52 — Cornual ectopic pregnancy with intrauterine pregnancy
Common questions about cornual gestation or pregnancy ICD-10 codes
What is the ICD-10 code for cornual gestation or pregnancy?
- O00.51 — Cornual ectopic pregnancy without intrauterine pregnancy (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: O00.52.
Is O00.51 billable?
- No. O00.51 is a header code. Report one of its more specific subcodes instead.