ICD-9-CM Vol. 1 Diagnostic Codes

7. DISEASES OF THE CIRCULATORY SYSTEM (390-459)

section notes

OTHER FORMS OF HEART DISEASE (420-429)

section notes

427 Cardiac dysrhythmias

section notes

427.8 Other specified cardiac dysrhythmias

section notes
427.81   Sinoatrial node dysfunct
427.89   Cardiac dysrhythmias NEC
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