Cervical shortening, second trimester

This code signifies a premature shortening of the uterine cervix during the second trimester of pregnancy. This condition indicates an increased risk of preterm labor and delivery due to the cervix dilating or effacing earlier than expected. It is often identified via transvaginal ultrasound measurement.

Use this code when documentation explicitly states cervical shortening or effacement is identified between 14 weeks 0 days and 27 weeks 6 days of gestation. This diagnosis is typically supported by ultrasound reports detailing cervical length measurements below established thresholds for the gestational age. It is often associated with symptoms such as pelvic pressure or contractions, but can also be an incidental finding.

• Ensure the documentation clearly specifies "second trimester" to differentiate from similar conditions in other trimesters.
• Do not confuse with incompetent cervix (N88.3), which is a broader term for cervical weakness, though cervical shortening can be a manifestation.
• Always sequence this code after the primary obstetric code (e.g., O09.- for supervision of high-risk pregnancy) if the pregnancy is ongoing.