Oth mult gest w two or more monoamnio fetuses, second tri

This code identifies a pregnancy involving multiple fetuses where at least two of them share a single amniotic sac (monoamniotic), and the pregnancy is currently in the second trimester. This condition carries significant risks due to potential cord entanglement and other complications.

Apply this code when documentation clearly indicates a multiple gestation with two or more monoamniotic fetuses, and the gestational age falls within the second trimester (typically weeks 14-27). Supporting documentation would include ultrasound reports confirming monoamniotic twins or higher-order multiples, and physician notes specifying the trimester.

• Ensure the documentation explicitly states "monoamniotic" for at least two fetuses, not just "monochorionic."
• Verify the gestational age to confirm the second trimester; separate codes exist for other trimesters.
• This code should be sequenced as a primary diagnosis when it is the focus of care or a significant complicating factor.