Cont preg aft spon abort of one fts or more, unsp tri, unsp

This code describes a multifetal pregnancy where one or more fetuses have been spontaneously aborted, but at least one fetus continues to develop. It indicates that the specific trimester of the spontaneous abortion is unknown or not documented. This scenario is often referred to as a "vanishing twin" or "vanishing triplet" phenomenon.

Use this code when documentation clearly states a history of spontaneous abortion of one or more fetuses in a multifetal pregnancy, with at least one fetus still viable, and the trimester of the loss is not specified. This code is appropriate when the patient is still pregnant following the loss of one or more fetuses.

• Ensure documentation specifies a continuing pregnancy after the loss of one or more fetuses.
• Do not use this code if the spontaneous abortion of all fetuses has occurred; instead, use codes from category O03.
• Always sequence this code as a secondary diagnosis, with the primary code reflecting the current obstetric complication or condition.