| O31 | Complications specific to multiple gestation | NON-BILLABLE CODE |
| O31.0 | Papyraceous fetus | NON-BILLABLE CODE |
| O31.00 | Papyraceous fetus, unspecified trimester | NON-BILLABLE CODE |
| O31.00X0 | Papyraceous fetus, unspecified trimester, not applicable or unspecified | BILLABLE CODE |
| O31.00X1 | Papyraceous fetus, unspecified trimester, fetus 1 | BILLABLE CODE |
| O31.00X2 | Papyraceous fetus, unspecified trimester, fetus 2 | BILLABLE CODE |
| O31.00X3 | Papyraceous fetus, unspecified trimester, fetus 3 | BILLABLE CODE |
| O31.00X4 | Papyraceous fetus, unspecified trimester, fetus 4 | BILLABLE CODE |
| O31.00X5 | Papyraceous fetus, unspecified trimester, fetus 5 | BILLABLE CODE |
| O31.00X9 | Papyraceous fetus, unspecified trimester, other fetus | BILLABLE CODE |
| O31.01 | Papyraceous fetus, first trimester | NON-BILLABLE CODE |
| O31.01X0 | Papyraceous fetus, first trimester, not applicable or unspecified | BILLABLE CODE |
| O31.01X1 | Papyraceous fetus, first trimester, fetus 1 | BILLABLE CODE |
| O31.01X2 | Papyraceous fetus, first trimester, fetus 2 | BILLABLE CODE |
| O31.01X3 | Papyraceous fetus, first trimester, fetus 3 | BILLABLE CODE |
| O31.01X4 | Papyraceous fetus, first trimester, fetus 4 | BILLABLE CODE |
| O31.01X5 | Papyraceous fetus, first trimester, fetus 5 | BILLABLE CODE |
| O31.01X9 | Papyraceous fetus, first trimester, other fetus | BILLABLE CODE |
| O31.02 | Papyraceous fetus, second trimester | NON-BILLABLE CODE |
| O31.02X0 | Papyraceous fetus, second trimester, not applicable or unspecified | BILLABLE CODE |
| O31.02X1 | Papyraceous fetus, second trimester, fetus 1 | BILLABLE CODE |
| O31.02X2 | Papyraceous fetus, second trimester, fetus 2 | BILLABLE CODE |
| O31.02X3 | Papyraceous fetus, second trimester, fetus 3 | BILLABLE CODE |
| O31.02X4 | Papyraceous fetus, second trimester, fetus 4 | BILLABLE CODE |
| O31.02X9 | Papyraceous fetus, second trimester, other fetus | BILLABLE CODE |
| O31.03 | Papyraceous fetus, third trimester | NON-BILLABLE CODE |
| O31.03X0 | Papyraceous fetus, third trimester, not applicable or unspecified | BILLABLE CODE |
| O31.03X1 | Papyraceous fetus, third trimester, fetus 1 | BILLABLE CODE |
| O31.03X2 | Papyraceous fetus, third trimester, fetus 2 | BILLABLE CODE |
| O31.03X3 | Papyraceous fetus, third trimester, fetus 3 | BILLABLE CODE |
| O31.03X4 | Papyraceous fetus, third trimester, fetus 4 | BILLABLE CODE |
| O31.03X5 | Papyraceous fetus, third trimester, fetus 5 | BILLABLE CODE |
| O31.03X9 | Papyraceous fetus, third trimester, other fetus | BILLABLE CODE |
| O31.1 | Continuing pregnancy after spontaneous abortion of one fetus or more | NON-BILLABLE CODE |
| O31.10 | Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester | NON-BILLABLE CODE |
| O31.10X0 | Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, not applicable or unspecified | BILLABLE CODE |
| O31.10X1 | Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 1 | BILLABLE CODE |
| O31.10X2 | Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 2 | BILLABLE CODE |
| O31.10X3 | Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 3 | BILLABLE CODE |
| O31.10X4 | Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 4 | BILLABLE CODE |
| O31.10X5 | Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 5 | BILLABLE CODE |
| O31.10X9 | Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, other fetus | BILLABLE CODE |
| O31.11 | Continuing pregnancy after spontaneous abortion of one fetus or more, first trimester | NON-BILLABLE CODE |
| O31.11X0 | Continuing pregnancy after spontaneous abortion of one fetus or more, first trimester, not applicable or unspecified | BILLABLE CODE |
| O31.11X1 | Continuing pregnancy after spontaneous abortion of one fetus or more, first trimester, fetus 1 | BILLABLE CODE |
| O31.11X2 | Continuing pregnancy after spontaneous abortion of one fetus or more, first trimester, fetus 2 | BILLABLE CODE |
| O31.11X3 | Continuing pregnancy after spontaneous abortion of one fetus or more, first trimester, fetus 3 | BILLABLE CODE |
| O31.11X4 | Continuing pregnancy after spontaneous abortion of one fetus or more, first trimester, fetus 4 | BILLABLE CODE |
| O31.11X5 | Continuing pregnancy after spontaneous abortion of one fetus or more, first trimester, fetus 5 | BILLABLE CODE |
| O31.11X9 | Continuing pregnancy after spontaneous abortion of one fetus or more, first trimester, other fetus | BILLABLE CODE |
| O31.12 | Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester | NON-BILLABLE CODE |
| O31.12X0 | Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, not applicable or unspecified | BILLABLE CODE |
| O31.12X1 | Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, fetus 1 | BILLABLE CODE |
| O31.12X2 | Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, fetus 2 | BILLABLE CODE |
| O31.12X3 | Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, fetus 3 | BILLABLE CODE |
| O31.12X4 | Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, fetus 4 | BILLABLE CODE |
| O31.12X5 | Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, fetus 5 | BILLABLE CODE |
| O31.12X9 | Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester, other fetus | BILLABLE CODE |
| O31.13 | Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester | NON-BILLABLE CODE |
| O31.13X0 | Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, not applicable or unspecified | BILLABLE CODE |
| O31.13X1 | Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, fetus 1 | BILLABLE CODE |
| O31.13X2 | Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, fetus 2 | BILLABLE CODE |
| O31.13X3 | Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, fetus 3 | BILLABLE CODE |
| O31.13X4 | Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, fetus 4 | BILLABLE CODE |
| O31.13X5 | Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, fetus 5 | BILLABLE CODE |
| O31.13X9 | Continuing pregnancy after spontaneous abortion of one fetus or more, third trimester, other fetus | BILLABLE CODE |
| O31.2 | Continuing pregnancy after intrauterine death of one fetus or more | NON-BILLABLE CODE |
| O31.20 | Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester | NON-BILLABLE CODE |
| O31.20X0 | Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, not applicable or unspecified | BILLABLE CODE |
| O31.20X1 | Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, fetus 1 | BILLABLE CODE |
| O31.20X2 | Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, fetus 2 | BILLABLE CODE |
| O31.20X3 | Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, fetus 3 | BILLABLE CODE |
| O31.20X4 | Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, fetus 4 | BILLABLE CODE |
| O31.20X5 | Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, fetus 5 | BILLABLE CODE |
| O31.20X9 | Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester, other fetus | BILLABLE CODE |
| O31.21 | Continuing pregnancy after intrauterine death of one fetus or more, first trimester | NON-BILLABLE CODE |
| O31.21X0 | Continuing pregnancy after intrauterine death of one fetus or more, first trimester, not applicable or unspecified | BILLABLE CODE |
| O31.21X1 | Continuing pregnancy after intrauterine death of one fetus or more, first trimester, fetus 1 | BILLABLE CODE |
| O31.21X2 | Continuing pregnancy after intrauterine death of one fetus or more, first trimester, fetus 2 | BILLABLE CODE |
| O31.21X3 | Continuing pregnancy after intrauterine death of one fetus or more, first trimester, fetus 3 | BILLABLE CODE |
| O31.21X4 | Continuing pregnancy after intrauterine death of one fetus or more, first trimester, fetus 4 | BILLABLE CODE |
| O31.21X5 | Continuing pregnancy after intrauterine death of one fetus or more, first trimester, fetus 5 | BILLABLE CODE |
| O31.21X9 | Continuing pregnancy after intrauterine death of one fetus or more, first trimester, other fetus | BILLABLE CODE |
| O31.22 | Continuing pregnancy after intrauterine death of one fetus or more, second trimester | NON-BILLABLE CODE |
| O31.22X0 | Continuing pregnancy after intrauterine death of one fetus or more, second trimester, not applicable or unspecified | BILLABLE CODE |
| O31.22X1 | Continuing pregnancy after intrauterine death of one fetus or more, second trimester, fetus 1 | BILLABLE CODE |
| O31.22X2 | Continuing pregnancy after intrauterine death of one fetus or more, second trimester, fetus 2 | BILLABLE CODE |
| O31.22X3 | Continuing pregnancy after intrauterine death of one fetus or more, second trimester, fetus 3 | BILLABLE CODE |
| O31.22X4 | Continuing pregnancy after intrauterine death of one fetus or more, second trimester, fetus 4 | BILLABLE CODE |
| O31.22X5 | Continuing pregnancy after intrauterine death of one fetus or more, second trimester, fetus 5 | BILLABLE CODE |
| O31.22X9 | Continuing pregnancy after intrauterine death of one fetus or more, second trimester, other fetus | BILLABLE CODE |
| O31.23 | Continuing pregnancy after intrauterine death of one fetus or more, third trimester | NON-BILLABLE CODE |
| O31.23X0 | Continuing pregnancy after intrauterine death of one fetus or more, third trimester, not applicable or unspecified | BILLABLE CODE |
| O31.23X1 | Continuing pregnancy after intrauterine death of one fetus or more, third trimester, fetus 1 | BILLABLE CODE |
| O31.23X2 | Continuing pregnancy after intrauterine death of one fetus or more, third trimester, fetus 2 | BILLABLE CODE |
| O31.23X3 | Continuing pregnancy after intrauterine death of one fetus or more, third trimester, fetus 3 | BILLABLE CODE |
| O31.23X4 | Continuing pregnancy after intrauterine death of one fetus or more, third trimester, fetus 4 | BILLABLE CODE |
| O31.23X5 | Continuing pregnancy after intrauterine death of one fetus or more, third trimester, fetus 5 | BILLABLE CODE |
| O31.23X9 | Continuing pregnancy after intrauterine death of one fetus or more, third trimester, other fetus | BILLABLE CODE |
| O31.3 | Continuing pregnancy after elective fetal reduction of one fetus or more | NON-BILLABLE CODE |
| O31.30 | Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester | NON-BILLABLE CODE |
| O31.30X0 | Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, not applicable or unspecified | BILLABLE CODE |
| O31.30X1 | Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, fetus 1 | BILLABLE CODE |
| O31.30X2 | Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, fetus 2 | BILLABLE CODE |
| O31.30X3 | Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, fetus 3 | BILLABLE CODE |
| O31.30X4 | Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, fetus 4 | BILLABLE CODE |
| O31.30X5 | Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, fetus 5 | BILLABLE CODE |
| O31.30X9 | Continuing pregnancy after elective fetal reduction of one fetus or more, unspecified trimester, other fetus | BILLABLE CODE |
| O31.31 | Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester | NON-BILLABLE CODE |
| O31.31X0 | Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, not applicable or unspecified | BILLABLE CODE |
| O31.31X1 | Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, fetus 1 | BILLABLE CODE |
| O31.31X2 | Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, fetus 2 | BILLABLE CODE |
| O31.31X3 | Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, fetus 3 | BILLABLE CODE |
| O31.31X4 | Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, fetus 4 | BILLABLE CODE |
| O31.31X5 | Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, fetus 5 | BILLABLE CODE |
| O31.31X9 | Continuing pregnancy after elective fetal reduction of one fetus or more, first trimester, other fetus | BILLABLE CODE |
| O31.32 | Continuing pregnancy after elective fetal reduction of one fetus or more, second trimester | NON-BILLABLE CODE |
| O31.32X0 | Continuing pregnancy after elective fetal reduction of one fetus or more, second trimester, not applicable or unspecified | BILLABLE CODE |
| O31.32X1 | Continuing pregnancy after elective fetal reduction of one fetus or more, second trimester, fetus 1 | BILLABLE CODE |
| O31.32X2 | Continuing pregnancy after elective fetal reduction of one fetus or more, second trimester, fetus 2 | BILLABLE CODE |
| O31.32X3 | Continuing pregnancy after elective fetal reduction of one fetus or more, second trimester, fetus 3 | BILLABLE CODE |
| O31.32X4 | Continuing pregnancy after elective fetal reduction of one fetus or more, second trimester, fetus 4 | BILLABLE CODE |
| O31.32X5 | Continuing pregnancy after elective fetal reduction of one fetus or more, second trimester, fetus 5 | BILLABLE CODE |
| O31.32X9 | Continuing pregnancy after elective fetal reduction of one fetus or more, second trimester, other fetus | BILLABLE CODE |
| O31.33 | Continuing pregnancy after elective fetal reduction of one fetus or more, third trimester | NON-BILLABLE CODE |
| O31.33X0 | Continuing pregnancy after elective fetal reduction of one fetus or more, third trimester, not applicable or unspecified | BILLABLE CODE |
| O31.33X1 | Continuing pregnancy after elective fetal reduction of one fetus or more, third trimester, fetus 1 | BILLABLE CODE |
| O31.33X2 | Continuing pregnancy after elective fetal reduction of one fetus or more, third trimester, fetus 2 | BILLABLE CODE |
| O31.33X3 | Continuing pregnancy after elective fetal reduction of one fetus or more, third trimester, fetus 3 | BILLABLE CODE |
| O31.33X4 | Continuing pregnancy after elective fetal reduction of one fetus or more, third trimester, fetus 4 | BILLABLE CODE |
| O31.33X5 | Continuing pregnancy after elective fetal reduction of one fetus or more, third trimester, fetus 5 | BILLABLE CODE |
| O31.33X9 | Continuing pregnancy after elective fetal reduction of one fetus or more, third trimester, other fetus | BILLABLE CODE |
| O31.8 | Other complications specific to multiple gestation | NON-BILLABLE CODE |
| O31.8X | Other complications specific to multiple gestation | NON-BILLABLE CODE |
| O31.8X1 | Other complications specific to multiple gestation, first trimester | NON-BILLABLE CODE |
| O31.8X10 | Other complications specific to multiple gestation, first trimester, not applicable or unspecified | BILLABLE CODE |
| O31.8X11 | Other complications specific to multiple gestation, first trimester, fetus 1 | BILLABLE CODE |
| O31.8X12 | Other complications specific to multiple gestation, first trimester, fetus 2 | BILLABLE CODE |
| O31.8X13 | Other complications specific to multiple gestation, first trimester, fetus 3 | BILLABLE CODE |
| O31.8X14 | Other complications specific to multiple gestation, first trimester, fetus 4 | BILLABLE CODE |
| O31.8X15 | Other complications specific to multiple gestation, first trimester, fetus 5 | BILLABLE CODE |
| O31.8X19 | Other complications specific to multiple gestation, first trimester, other fetus | BILLABLE CODE |
| O31.8X2 | Other complications specific to multiple gestation, second trimester | NON-BILLABLE CODE |
| O31.8X20 | Other complications specific to multiple gestation, second trimester, not applicable or unspecified | BILLABLE CODE |
| O31.8X21 | Other complications specific to multiple gestation, second trimester, fetus 1 | BILLABLE CODE |
| O31.8X22 | Other complications specific to multiple gestation, second trimester, fetus 2 | BILLABLE CODE |
| O31.8X23 | Other complications specific to multiple gestation, second trimester, fetus 3 | BILLABLE CODE |
| O31.8X24 | Other complications specific to multiple gestation, second trimester, fetus 4 | BILLABLE CODE |
| O31.8X25 | Other complications specific to multiple gestation, second trimester, fetus 5 | BILLABLE CODE |
| O31.8X29 | Other complications specific to multiple gestation, second trimester, other fetus | BILLABLE CODE |
| O31.8X3 | Other complications specific to multiple gestation, third trimester | NON-BILLABLE CODE |
| O31.8X30 | Other complications specific to multiple gestation, third trimester, not applicable or unspecified | BILLABLE CODE |
| O31.8X31 | Other complications specific to multiple gestation, third trimester, fetus 1 | BILLABLE CODE |
| O31.8X32 | Other complications specific to multiple gestation, third trimester, fetus 2 | BILLABLE CODE |
| O31.8X33 | Other complications specific to multiple gestation, third trimester, fetus 3 | BILLABLE CODE |
| O31.8X34 | Other complications specific to multiple gestation, third trimester, fetus 4 | BILLABLE CODE |
| O31.8X35 | Other complications specific to multiple gestation, third trimester, fetus 5 | BILLABLE CODE |
| O31.8X39 | Other complications specific to multiple gestation, third trimester, other fetus | BILLABLE CODE |
| O31.8X9 | Other complications specific to multiple gestation, unspecified trimester | NON-BILLABLE CODE |
| O31.8X90 | Other complications specific to multiple gestation, unspecified trimester, not applicable or unspecified | BILLABLE CODE |
| O31.8X91 | Other complications specific to multiple gestation, unspecified trimester, fetus 1 | BILLABLE CODE |
| O31.8X92 | Other complications specific to multiple gestation, unspecified trimester, fetus 2 | BILLABLE CODE |
| O31.8X93 | Other complications specific to multiple gestation, unspecified trimester, fetus 3 | BILLABLE CODE |
| O31.8X94 | Other complications specific to multiple gestation, unspecified trimester, fetus 4 | BILLABLE CODE |
| O31.8X95 | Other complications specific to multiple gestation, unspecified trimester, fetus 5 | BILLABLE CODE |
| O31.8X99 | Other complications specific to multiple gestation, unspecified trimester, other fetus | BILLABLE CODE |
