Oth mult gest, num chorions & amnions = num ftses, 3rd tri

This code signifies a multiple gestation pregnancy (e.g., triplets, quadruplets) where each fetus has its own chorion and amnion, indicating a diamniotic-dichorionic arrangement for each individual fetus. This specific type of multiple gestation is observed during the third trimester of pregnancy. It represents a less common and often more complex form of multiple pregnancy compared to monochorionic or monoamniotic types.

Use this code when documentation clearly specifies a multiple gestation (e.g., triplets, quadruplets, etc.) where the number of chorions and amnions precisely matches the number of fetuses. This diagnosis is applicable during the third trimester of pregnancy, typically from 28 weeks gestation until delivery. Supporting documentation would include ultrasound reports detailing chorionicity and amnionicity for each fetus, along with gestational age.

• Ensure the documentation explicitly states that both the number of chorions and amnions are equal to the number of fetuses, not just one or the other.
• Verify the gestational age falls within the third trimester (28 weeks 0 days to 40 weeks 6 days).
• Do not confuse this with codes for unspecified multiple gestations or those where chorionicity/amnionicity is not clearly documented as matching the number of fetuses.