Preterm labor second tri w preterm delivery third tri, oth

This code describes a pregnancy where preterm labor begins during the second trimester (weeks 14 through 27+6 days) but the actual preterm delivery of a fetus other than the first-born occurs in the third trimester (weeks 28 through 40). This indicates a prolonged labor course or intervention that extended the delivery into the third trimester after the onset of preterm labor.

Use this code when documentation clearly states preterm labor initiated in the second trimester, but the delivery of a subsequent fetus (e.g., in a twin or triplet pregnancy) happened in the third trimester. This code requires explicit documentation of the trimester of labor onset and the trimester of delivery for the specific fetus.

• Ensure documentation specifies "other fetus" in a multiple gestation pregnancy; otherwise, a code for the first-born fetus might be more appropriate.
• Distinguish carefully between the onset of labor and the actual delivery, as both trimester periods are critical for accurate coding.
• Always sequence this code after the primary obstetric code indicating the type of delivery and the outcome of the delivery.