2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Complications Of Pregnancy, Childbirth, And The Puerperium 630-677 > Complications Occurring Mainly In The Course Of Labor And Delivery 660-669 > Abnormality Of Forces Of Labor 661.* > 2008 ICD-9-CM Diagnosis 661.1 Secondary uterine inertia  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 Therefore, this code may be out of date.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 661.1 can be accessed here. 661.1 is a non-specific code that cannot be used to specify a diagnosis 661.1 contains 11 index entries View the ICD-9-CM Volume 1 661.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 661.1: Arrest, arrested active phase of labor 661.1 affecting fetus or newborn 763.7 Delivery cesarean (for) 669.7 inertia, uterus 661.2 secondary 661.1 complicated (by) NEC 669.9 arrested active phase 661.1 dysfunction, uterus 661.9 hypotonic 661.2 secondary 661.1 inertia, uterus 661.2 secondary 661.1 prolonged labor 662.1 due to uterine inertia 661.2 secondary 661.1 secondary uterine inertia 661.1 Dysfunction uterus, complicating delivery 661.9 hypotonic 661.2 secondary 661.1 Inertia uterus, uterine 661.2 secondary 661.1 Labor (see also Delivery) arrested active phase 661.1 affecting fetus or newborn 763.7 hypotonic 661.2 secondary 661.1 affecting fetus or newborn 763.7