Quad preg, quadrachorionic/quadra-amniotic, unsp trimester

This code signifies a pregnancy involving four fetuses, where each fetus has its own chorion and amnion. This is the least common and most complex type of quadruplet pregnancy, indicating four separate placentas and four separate amniotic sacs. The "unspecified trimester" indicates that the specific trimester of gestation is not documented or known.

Assign this code for a documented quadruplet pregnancy confirmed as quadrachorionic/quadra-amniotic when the trimester is not specified in the medical record. This typically occurs during initial diagnostic imaging (e.g., ultrasound) where chorionicity and amnionicity are determined, but the exact gestational age or trimester is not yet precisely established or documented.

• Ensure documentation explicitly states "quadruplet pregnancy" and "quadrachorionic/quadra-amniotic."
• If the trimester is known, use the more specific O30.21- or O30.22- codes.
• This code is a primary diagnosis for the pregnancy itself; additional codes for complications or maternal conditions should be sequenced accordingly.