Triplet pregnancy, trichorionic/triamniotic, unsp trimester

This code signifies a multifetal gestation involving three fetuses, where each fetus has its own chorion and amnion. This indicates three separate placentas and three separate amniotic sacs, representing the least complicated type of triplet pregnancy in terms of shared resources. The specific trimester of the pregnancy is not documented or specified.

Apply this code when documentation clearly states a triplet pregnancy with trichorionic/triamniotic placentation, and the trimester is either unknown or not recorded. This is typically identified via ultrasound imaging that visualizes three distinct gestational sacs and three separate placentas.

• Ensure documentation explicitly states "trichorionic" and "triamniotic" for triplets; do not assume based on "triplet pregnancy" alone.
• If the trimester is known, a more specific code from the O30.13- series should be used.
• This code should be sequenced as a primary diagnosis when the triplet pregnancy is the focus of the encounter, or as a secondary diagnosis when it's an incidental finding or comorbidity.