ICD-10-CM > O00-O9A > O85-O92 > O88 > O88.0 > O88.01 O88.01 Obstetric air embolism in pregnancy Non-Billable/Non-Specific Codes O88.011Air embolism in pregnancy, first trimesterO88.012Air embolism in pregnancy, second trimesterO88.013Air embolism in pregnancy, third trimesterO88.019Air embolism in pregnancy, unspecified trimester