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
478 Other diseases of upper respiratory tract
section notes
478.2 Other diseases of pharynx not elsewhere classified
section notes
478.20   Disease of pharynx NOS
478.21   Cellulitis of pharynx
478.22   Parapharyngeal abscess
478.24   Retropharyngeal abscess
478.25   Edema pharynx/nasopharyx
478.26   Cyst pharynx/nasopharynx
478.29   Disease of pharynx NEC
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