O00.12Interstitial ectopic pregnancy without intrauterine pregnancy

O00.12 is the ICD-10-CM diagnosis code for interstitial ectopic pregnancy without intrauterine pregnancy. It belongs to category O00 (ectopic pregnancy), block O00-O08 (pregnancy with abortive outcome) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within O00.1, choose O00.12 (Interstitial ectopic pregnancy without intrauterine pregnancy) only when documentation doesn't support a more specific option: without intrauterine pregnancy (O00.10), with intrauterine pregnancy (O00.11) and interstitial ectopic pregnancy with intrauterine pregnancy (O00.13).

To report this condition, pick the subcode that matches the documentation: O00.121 (pregnancy), O00.122 (pregnancy) and O00.129 (pregnancy).

Use an additional code from category O08 to identify any associated complication.

It was added in FY2027, effective October 1, 2026.