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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Other Forms Of Heart Disease 420-429 > Cardiac Dysrhythmias 427.* > 2008 ICD-9-CM Diagnosis 427.9 Cardiac dysrhythmia unspecified  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 Therefore, this code may be out of date.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 427.9 can be accessed here. An abnormal rate of muscle contractions in the heart. Any variation from the normal rhythm or rate of the heart beat. 427.9 is a specific code that can be used to specify a diagnosis 427.9 contains 12 index entries View the ICD-9-CM Volume 1 427.* hierarchy 427.9 also known as: Arrhythmia (cardiac) NOS Index entries containing 427.9: Action, heart disorder 427.9 postoperative 997.1 irregular 427.9 postoperative 997.1 psychogenic 306.2 Arrhythmia (auricle) (cardiac) (cordis) (gallop rhythm) (juvenile) (nodal) (reflex) (sinus) (supraventricular) (transitory) (ventricle) 427.9 bigeminal rhythm 427.89 block 426.9 bradycardia 427.89 contractions, premature 427.60 coronary sinus 427.89 ectopic 427.89 extrasystolic 427.60 postoperative 997.1 psychogenic 306.2 vagal 780.2 Disease, diseased - see also Syndrome heart (organic) 429.9 functional 427.9 postoperative 997.1 psychogenic 306.2 Disorder - see also Disease cardiac, functional 427.9 postoperative 997.1 psychogenic 306.2 heart action 427.9 postoperative 997.1 Disturbance - see also Disease rhythm, heart 427.9 postoperative (immediate) 997.1 long-term effect of cardiac surgery 429.4 psychogenic 306.2 Dysfunction heart 427.9 postoperative (immediate) 997.1 long-term effect of cardiac surgery 429.4 Dysrhythmia cardiac 427.9 postoperative (immediate) 997.1 long-term effect of cardiac surgery 429.4 specified type NEC 427.89 Irregular, irregularity action, heart 427.9 Rhythm disorder 427.9 coronary sinus 427.89 ectopic 427.89 nodal 427.89 heart, abnormal 427.9 fetus or newborn - see Abnormal, heart rate