Multiple gestation, unspecified, first trimester

This code signifies a pregnancy involving more than one fetus where the specific type of multiple gestation (e.g., twins, triplets) has not yet been determined or documented. It indicates that the patient is in the first trimester of this multiple pregnancy.

Use this code when documentation confirms a multiple gestation but the exact number of fetuses is not specified, and the pregnancy is within the first trimester. This is often an initial diagnosis based on early ultrasound findings before definitive fetal count. Documentation should clearly state "multiple gestation, unspecified" or similar, along with the first trimester.

• Do not use this code if the number of fetuses is known (e.g., twin pregnancy, triplet pregnancy); instead, use a more specific O30 code.
• Ensure the documentation explicitly states "first trimester" or provides the gestational age that falls within the first trimester (up to the end of the 13th week).
• This code will likely be replaced by a more specific O30 code once the number of fetuses is identified.