O40: Polyhydramnios includes hydramnios excludes1 encounter for suspected maternal and fetal conditions ruled out (Z03.7-) sevenChrNote One of the following 7th characters is to be assigned to each code under category O40. 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 O40 that has a 7th character of 1 through 9. sevenChrDef 0: not applicable or unspecified 1: fetus 1 2: fetus 2 3: fetus 3 4: fetus 4 5: fetus 5 9: other fetus |
| O40.1: Polyhydramnios, first trimester |
| O40.2: Polyhydramnios, second trimester |
| O40.3: Polyhydramnios, third trimester |
| O40.9: Polyhydramnios, unspecified trimester |