ICD-9-CM Vol. 1 Diagnostic Codes →
8. DISEASES OF THE RESPIRATORY SYSTEM (460-519) →
section notes
ACUTE RESPIRATORY INFECTIONS (460-466) →
section notes
464 Acute laryngitis and tracheitis →
section notes
464.2 Acute laryngotracheitis →
section notes
464.20   Ac laryngotrach no obstr
464.21   Ac laryngotrach w obstr
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