Preterm labor without delivery, unspecified trimester

This code signifies the occurrence of regular uterine contractions causing cervical changes (effacement or dilation) before 37 completed weeks of gestation, without the actual birth of the infant. It indicates a threatened preterm delivery that was successfully arrested or resolved without progression to delivery.

Use this code when a pregnant patient presents with signs and symptoms of preterm labor, but the pregnancy continues beyond the encounter. Documentation should clearly state "preterm labor arrested," "preterm contractions without delivery," or similar phrasing indicating that delivery did not occur. This code is appropriate when the specific trimester is not documented.

• Do not use this code if delivery occurs during the same encounter; instead, code for preterm delivery.
• Requires documentation of uterine contractions and cervical changes (effacement/dilation) to support preterm labor.
• If the trimester is documented, use the more specific codes O60.01, O60.02, or O60.03.