O00.01 vs O31.3
O00.01 (Abdominal pregnancy with intrauterine pregnancy) compared with O31.3 (Continuing pregnancy after elective fetal reduction of one fetus or more), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. O00.01 carries an Excludes1 note covering O31.3: “continuing pregnancy in multiple gestation after abortion of one fetus or more (O31.1-, O31.3-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| O00.01Abdominal pregnancy with intrauterine pregnancy | O31.3Continuing pregnancy after elective fetal reduction of one fetus or more | |
|---|---|---|
| Billing status | Billable | Non-billable header Report instead: O31.30X0, O31.30X1, O31.30X2, O31.30X3, O31.30X4 |
| Classification | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) |
| Definition | Abdominal pregnancy with intrauterine pregnancy is a billable ICD-10-CM diagnosis code (O00.01). | Continuing pregnancy after elective fetal reduction of one fetus or more is a non-billable ICD-10-CM category code (O31.3). |
| 7th character | — | One of the following 7th characters is to be assigned to each code under category O31. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O31 that has a 7th character of 1 through 9. |
| Includes | ruptured ectopic pregnancy | Continuing pregnancy after selective termination of one fetus or more |
| Use additional code | code from category O08 to identify any associated complication | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources