Preterm labor second tri w preterm del third tri, fetus 3

This code signifies the occurrence of labor contractions leading to cervical changes and subsequent delivery during the third trimester, following the onset of preterm labor in the second trimester. It specifically applies when the pregnancy involves a third fetus, indicating a multifetal gestation.

Apply this code when a patient experiences preterm labor between 14 weeks 0 days and 27 weeks 6 days of gestation, but the actual delivery of the third fetus occurs at or after 28 weeks 0 days. Documentation should clearly state the gestational age at the onset of preterm labor, the gestational age at delivery, and confirm the presence of a third fetus.

• Ensure documentation specifies "fetus 3" to differentiate from other fetuses in a multiple gestation.
• Do not use this code if both preterm labor and preterm delivery occur within the second trimester.
• Sequence this code as the principal diagnosis when it is the reason for the encounter.