ICD-10-CM > O00-O9A > O20-O29 > O29 > O29.1 > O29.11 O29.11 Cardiac arrest due to anesthesia during pregnancy Non-Billable/Non-Specific Codes O29.111Cardiac arrest due to anesthesia during pregnancy, first trimesterO29.112Cardiac arrest due to anesthesia during pregnancy, second trimesterO29.113Cardiac arrest due to anesthesia during pregnancy, third trimesterO29.119Cardiac arrest due to anesthesia during pregnancy, unspecified trimester