ICD-9-CM Vol. 1 Diagnostic Codes →
8. DISEASES OF THE RESPIRATORY SYSTEM (460-519) →
section notes
OTHER DISEASES OF THE UPPER RESPIRATORY TRACT (470-478) →
section notes
473 Chronic sinusitis →
section notes
473.0   Chr maxillary sinusitis
473.1   Chr frontal sinusitis
473.2   Chr ethmoidal sinusitis
473.3   Chr sphenoidal sinusitis
473.8   Chronic sinusitis NEC
473.9   Chronic sinusitis NOS
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