| O26891 | Other specified pregnancy related conditions, first trimester |
| O26892 | Other specified pregnancy related conditions, second trimester |
| O26893 | Other specified pregnancy related conditions, third trimester |
| O26899 | Other specified pregnancy related conditions, unspecified trimester |
| O269 | Pregnancy related conditions, unspecified |
| O2690 | Pregnancy related conditions, unspecified, unspecified trimester |
| O2691 | Pregnancy related conditions, unspecified, first trimester |
| O2692 | Pregnancy related conditions, unspecified, second trimester |
| O2693 | Pregnancy related conditions, unspecified, third trimester |
| O28 | Abnormal findings on antenatal screening of mother |
| O280 | Abnormal hematological finding on antenatal screening of mother |
| O281 | Abnormal biochemical finding on antenatal screening of mother |
| O282 | Abnormal cytological finding on antenatal screening of mother |
| O283 | Abnormal ultrasonic finding on antenatal screening of mother Abnormal ultrasonic finding on antenatal screening of mother |
| O284 | Abnormal radiological finding on antenatal screening of mother |
| O285 | Abnormal chromosomal and genetic finding on antenatal screening of mother |
| O288 | Other abnormal findings on antenatal screening of mother |
| O289 | Unspecified abnormal findings on antenatal screening of mother |
| O29 | Complications of anesthesia during pregnancy |
| O290 | Pulmonary complications of anesthesia during pregnancy |
| O2901 | Aspiration pneumonitis due to anesthesia during pregnancy |
| O29011 | Aspiration pneumonitis due to anesthesia during pregnancy, first trimester |
| O29012 | Aspiration pneumonitis due to anesthesia during pregnancy, second trimester |
| O29013 | Aspiration pneumonitis due to anesthesia during pregnancy, third trimester |
| O29019 | Aspiration pneumonitis due to anesthesia during pregnancy, unspecified trimester |
| O2902 | Pressure collapse of lung due to anesthesia during pregnancy Pressure collapse of lung due to anesthesia during pregnancy |
| O29021 | Pressr collapse of lung due to anesth during preg, first tri Pressure collapse of lung due to anesthesia during pregnancy, first trimester |
| O29022 | Pressure collapse of lung due to anesthesia during pregnancy, second trimester |
| O29023 | Pressr collapse of lung due to anesth during preg, third tri Pressure collapse of lung due to anesthesia during pregnancy, third trimester |
| O29029 | Pressure collapse of lung due to anesthesia during pregnancy, unspecified trimester |
| O2909 | Other pulmonary complications of anesthesia during pregnancy Other pulmonary complications of anesthesia during pregnancy |
| O29091 | Other pulmonary complications of anesthesia during pregnancy, first trimester |
| O29092 | Other pulmonary complications of anesthesia during pregnancy, second trimester |
| O29093 | Other pulmonary complications of anesthesia during pregnancy, third trimester |
| O29099 | Other pulmonary complications of anesthesia during pregnancy, unspecified trimester |
| O291 | Cardiac complications of anesthesia during pregnancy |
| O2911 | Cardiac arrest due to anesthesia during pregnancy |
| O29111 | Cardiac arrest due to anesthesia during pregnancy, first trimester |
| O29112 | Cardiac arrest due to anesthesia during pregnancy, second trimester |
| O29113 | Cardiac arrest due to anesthesia during pregnancy, third trimester |
| O29119 | Cardiac arrest due to anesthesia during pregnancy, unspecified trimester |
| O2912 | Cardiac failure due to anesthesia during pregnancy |
| O29121 | Cardiac failure due to anesthesia during pregnancy, first trimester |
| O29122 | Cardiac failure due to anesthesia during pregnancy, second trimester |
| O29123 | Cardiac failure due to anesthesia during pregnancy, third trimester |
| O29129 | Cardiac failure due to anesthesia during pregnancy, unspecified trimester |
| O2919 | Other cardiac complications of anesthesia during pregnancy |
| O29191 | Oth cardiac comp of anesth during pregnancy, first trimester Other cardiac complications of anesthesia during pregnancy, first trimester |
| O29192 | Other cardiac complications of anesthesia during pregnancy, second trimester |
| O29193 | Oth cardiac comp of anesth during pregnancy, third trimester Other cardiac complications of anesthesia during pregnancy, third trimester |