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
421 Acute and subacute endocarditis →
section notes
421.0   Ac/subac bact endocard
421.1   Ac endocardit in oth dis
421.9   Ac/subac endocardit NOS
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