O60.0 Preterm labor without deliveryNon-billable header with 3 child codes.
O60.00 Preterm labor without delivery, unspecified trimesterO60.02 Preterm labor without delivery, second trimesterO60.03 Preterm labor without delivery, third trimesterO47 False labor ("preterm labor (O60.-)")Z3A Weeks of gestation ("obstetric condition or encounter for delivery (O09-O60, O80-O82, O94-O9A)")O60 Preterm laborO60.0 Preterm labor without delivery (this code)O60.00 Preterm labor without delivery, unspecified trimesterO60.02 Preterm labor without delivery, second trimesterO60.03 Preterm labor without delivery, third trimesterO60.1 Preterm labor with preterm deliveryO60.10 Preterm labor with preterm delivery, unspecified trimester