2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Complications Of Pregnancy, Childbirth, And The Puerperium 630-677 > Complications Mainly Related To Pregnancy 640-649 > Early Or Threatened Labor 644.* > 2008 ICD-9-CM Diagnosis 644.2 Early onset of delivery  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 644.2 can be accessed here. CHILDBIRTH before 37 weeks of PREGNANCY (259 days from the first day of the mother's last menstrual period, or 245 days after FERTILIZATION). 644.2 is a non-specific code that cannot be used to specify a diagnosis 644.2 contains 11 index entries View the ICD-9-CM Volume 1 644.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 644.2: Delivery complicated (by) NEC 669.9 labor, premature (before 37 completed weeks gestation) 644.2 premature labor (before 37 completed weeks gestation) 644.2 early onset (spontaneous) 644.2 premature NEC (before 37 completed weeks gestation) 644.2 previous, affecting management of pregnancy V23.41 threatened premature 644.2 Labor (see also Delivery) early onset (22-36 weeks gestation) 644.2 premature 644.2 threatened 644.0 Pregnancy (single) (uterine) (without sickness) V22.2 complicated (by) 646.9 early onset of delivery (spontaneous) 644.2 threatened premature delivery 644.2 Premature - see also condition labor 644.2 threatened 644.0 Threatened premature delivery 644.2 affecting fetus or newborn 761.8