O31 vs O63.2
O31 (Complications specific to multiple gestation) compared with O63.2 (Delayed delivery of second twin, triplet, etc.), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. O31 carries an Excludes2 note covering O63.2: “delayed delivery of second twin, triplet, etc. (O63.2)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| O31Complications specific to multiple gestation | O63.2Delayed delivery of second twin, triplet, etc. | |
|---|---|---|
| Billing status | Non-billable header Report instead: O31.00X0, O31.00X1, O31.00X2, O31.00X3, O31.00X4 | Billable |
| Classification | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) |
| Definition | Complications specific to multiple gestation is a non-billable ICD-10-CM category code (O31). | Delayed delivery of second twin, triplet, etc. |
| 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. | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources