ICD-9-CM

473 Chronic sinusitis Includes: abscess (chronic) of sinus (accessory) (nasal) empyema (chronic) of sinus (accessory) (nasal) infection (chronic) of sinus (accessory) (nasal) suppuration (chronic) of sinus (accessory) (nasal) Excludes: acute sinusitis (461.0-461.9)
473.0: Maxillary Antritis (chronic)
473.1: Frontal
473.2: Ethmoidal Excludes: Woakes' ethmoiditis (471.1)
473.3: Sphenoidal
473.8: Other chronic sinusitis Pansinusitis (chronic)
473.9: Unspecified sinusitis (chronic) Sinusitis (chronic) NOS

473 Chronic sinusitis

Includes:

abscess (chronic) of sinus (accessory) (nasal)

empyema (chronic) of sinus (accessory) (nasal)

infection (chronic) of sinus (accessory) (nasal)

suppuration (chronic) of sinus (accessory) (nasal)

Excludes:

acute sinusitis (461.0-461.9)

Antritis (chronic)