2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Ischemic Heart Disease 410-414 > Other Acute And Subacute Forms Of Ischemic Heart Disease 411.* > 2008 ICD-9-CM Diagnosis 411.1 Intermediate coronary syndrome  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 Therefore, this code may be out of date.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 411.1 can be accessed here. Precordial pain at rest, which may precede a MYOCARDIAL INFARCTION. 411.1 is a specific code that can be used to specify a diagnosis 411.1 contains 15 index entries View the ICD-9-CM Volume 1 411.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 411.1 also known as: Impending infarction Preinfarction angina Preinfarction syndrome Unstable angina 411.1 excludes: angina (pectoris) (413.9) decubitus (413.0) Index entries containing 411.1: Angina (attack) (cardiac) (chest) (effort) (heart) (pectoris) (syndrome) (vasomotor) 413.9 accelerated 411.1 crescendo 411.1 initial 411.1 preinfarctional 411.1 progressive 411.1 unstable 411.1 Impending coronary syndrome 411.1 myocardial infarction 411.1 Infarct, infarction impending (myocardium) 411.1 myocardium, myocardial (acute or with a stated duration of 8 weeks or less) (with hypertension) 410.9 impending 411.1 Syndrome - see also Disease acute coronary 411.1 coronary insufficiency or intermediate 411.1 impending coronary 411.1 intermediate coronary (artery) 411.1 preinfarction 411.1