Partial placenta previa with hemorrhage, second trimester

This code signifies a condition where the placenta partially covers the internal cervical os during the second trimester of pregnancy, accompanied by vaginal bleeding. This placental positioning can lead to significant maternal and fetal complications due to the risk of hemorrhage.

Apply this code when documentation clearly indicates a partial placenta previa diagnosed in the second trimester, specifically noting the presence of active or historical hemorrhage. Supporting documentation should include ultrasound reports confirming placental location and clinical notes detailing the bleeding episode.

• Ensure the documentation specifies "partial" previa; differentiate from complete or marginal previa.
• Verify the gestational age falls within the second trimester (weeks 14-27+6 days).
• Always sequence this code as the principal diagnosis when it is the reason for the encounter.