Oth multiple gest, unsp num plcnta & amnio sacs, second tri

This code signifies a pregnancy involving more than one fetus, where the specific type of multiple gestation (e.g., twins, triplets) is known, but the number of placentas and amniotic sacs has not been determined. This diagnosis is made during the second trimester of pregnancy.

Use this code when documentation clearly indicates a multiple gestation (e.g., "multiple gestation, type unspecified") and the patient is in her second trimester, but ultrasound or other diagnostic imaging has not yet definitively identified chorionicity or amnionicity. This code is appropriate when the specific type of multiple gestation is known (e.g., "twin pregnancy") but the chorionicity/amnionicity is still pending.

• Do not use this code if chorionicity and amnionicity are documented (e.g., dichorionic/diamniotic).
• Ensure the medical record explicitly states "second trimester" for accurate trimester assignment.
• Sequence this code as the primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis when monitoring a multiple gestation.