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

This code describes a multifetal pregnancy where one or more fetuses have been spontaneously aborted, but at least one other fetus continues to develop. It indicates a partial loss within a multiple gestation, with the remaining fetus(es) still viable.

Apply this code when documentation confirms a spontaneous abortion of one or more fetuses in a multiple gestation, and the pregnancy is ongoing with at least one remaining fetus. This code is appropriate when the specific trimester of the fetal loss is not documented.

• Always sequence this code after the primary obstetric code for the ongoing pregnancy.
• Ensure documentation clearly distinguishes between spontaneous abortion of one fetus and a complete spontaneous abortion of all fetuses.
• Do not use if the specific trimester of the fetal demise is known; instead, use the trimester-specific codes (O31.11X9, O31.12X9, O31.13X9).