O31

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.

7th Character

0 - not applicable or unspecified

7th Character

1 - fetus 1

7th Character

2 - fetus 2

7th Character

3 - fetus 3

7th Character

4 - fetus 4

7th Character

5 - fetus 5

7th Character

9 - other fetus