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

This diagnosis code indicates 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 or documented. This condition is observed during the third trimester of pregnancy.

Use this code when documentation specifies a multiple gestation (e.g., "multiple gestation, type unspecified") and the number of placentas and amniotic sacs is not documented, and the patient is in her third trimester. This code is appropriate when the exact chorionicity and amnionicity are unknown or not yet determined by ultrasound.

• Always strive for more specific codes if chorionicity and amnionicity are documented (e.g., O30.0- for twin pregnancy).
• Ensure the medical record clearly indicates "third trimester" for accurate code assignment.
• Do not use this code if the type of multiple gestation itself is unspecified; refer to O30.9- series for that scenario.