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8x2 Other complications of anesthesia during pregnancy, second trimester

O29.8x3 Other complications of anesthesia during pregnancy, third trimester

O29.8x9 Other complications of anesthesia during pregnancy, unspecified trimester

O29.9 Unspecified complication of anesthesia during pregnancy

O29.90 Unspecified complication of anesthesia during pregnancy, unspecified trimester

O29.91 Unspecified complication of anesthesia during pregnancy, first trimester

O29.92 Unspecified complication of anesthesia during pregnancy, second trimester

O29.93 Unspecified complication of anesthesia during pregnancy, third trimester

Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)

O30 Multiple gestation

Code also any complications specific to multiple gestation

O30.0 Twin pregnancy

O30.00 Twin pregnancy, unspecified

O30.001 Twin pregnancy, unspecified, first trimester

O30.002 Twin pregnancy, unspecified, second trimester

O30.003 Twin pregnancy, unspecified, third trimester

O30.009 Twin pregnancy, unspecified, unspecified trimester

O30.01 Twin pregnancy, monoamniotic/monochorionic

O30.011 Twin pregnancy, monoamniotic/monochorionic, first trimester

O30.012 Twin pregnancy, monoamniotic/monochorionic, second trimester

O30.013 Twin pregnancy, monoamniotic/monochorionic, third trimester

O30.019 Twin pregnancy, monoamniotic/monochorionic, unspecified trimester

O30.02 Conjoined twins

O30.