Cont preg aft spon abort of one fetus or more, 2nd tri, oth

This code describes a multifetal pregnancy where one or more fetuses were spontaneously aborted during the second trimester, but at least one other fetus remains viable and the pregnancy is continuing. It indicates a partial loss within a multiple gestation, specifically occurring between 14 weeks 0 days and 27 weeks 6 days of gestation.

Use this code when documentation clearly indicates a multiple gestation with a confirmed spontaneous abortion of one or more fetuses in the second trimester, and the remaining fetus(es) are still present and the pregnancy is ongoing. This typically applies to situations like a "vanishing twin" syndrome occurring in the second trimester, where the loss is documented as spontaneous.

• Always confirm the trimester of the fetal loss; this code is specific to the second trimester.
• Ensure documentation specifies "spontaneous abortion" and not an induced termination or fetal demise of all fetuses.
• Sequence this code as a secondary diagnosis following the primary code for the ongoing pregnancy (e.g., O30.- for multiple gestation).