ICD-10-CM > O00-O9A > O30-O48 > O47 > O47.0 O47.0 False labor before 37 completed weeks of gestation Non-Billable/Non-Specific Codes O47.00False labor before 37 completed weeks of gestation, unspecified trimesterO47.02False labor before 37 completed weeks of gestation, second trimesterO47.03False labor before 37 completed weeks of gestation, third trimester