Specific code 2014 ICD-9-CM Diagnosis Code 473.9
Unspecified sinusitis (chronic)
  • Billable Code
  • Short description: Chronic sinusitis NOS.
  • ICD-9-CM 473.9 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 473.9 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Abscess of accessory sinus bone
  • Abscess of bone of accessory sinus
  • Abscess of nasal sinus
  • Chronic sinusitis
  • Disorder of nasal sinus
  • Empyema of nasal sinus
  • Nasal infection
  • Nasal sinus abscess
  • Nasal sinus disease
  • Nasal sinus empyema
  • Sinusitis
  • Sinusitis w nasal polyposis
  • Sinusitis with nasal polyps
  • Sinusitis, chronic
Clinical Information
  • Inflammation of the paranasal sinuses that typically lasts beyond eight weeks. It is caused by infections, allergies, and the presence of sinus polyps or deviated septum. Signs and symptoms include headache, nasal discharge, swelling in the face, dizziness, and breathing difficulties.
  • Inflammatory process of the mucous membranes of the paranasal sinuses that occurs in three stages: acute, subacute, and chronic; results from any condition causing ostial obstruction or from pathophysiologic changes in the mucociliary transport mechanism.
Applies To
  • Sinusitis (chronic) NOS
Convert to ICD-10-CM: 473.9 converts directly to:
  • 2014 ICD-10-CM J32.9 Chronic sinusitis, unspecified
ICD-9-CM Volume 2 Index entries containing back-references to 473.9:
  • Abscess (acute) (chronic) (infectional) (lymphangitic) (metastatic) (multiple) (pyogenic) (septic) (with lymphangitis) (see also Cellulitis) 682.9
    • accessory sinus (chronic) (see also Sinusitis) 473.9
    • bone (subperiosteal) (see also Osteomyelitis) 730.0
      • accessory sinus (chronic) (see also Sinusitis) 473.9
      • acute 730.0
      • chronic or old 730.1
      • jaw (lower) (upper) 526.4
      • mastoid - see Mastoiditis, acute
      • petrous (see also Petrositis) 383.20
      • spinal (tuberculous) (see also Tuberculosis) 015.0 [730.88]
    • nasal (fossa) (septum) 478.19
      • sinus (chronic) (see also Sinusitis) 473.9
    • parasinus (see also Sinusitis) 473.9
    • perisinuous (nose) (see also Sinusitis) 473.9
    • sinus (accessory) (chronic) (nasal) (see also Sinusitis) 473.9
      • intracranial venous (any) 324.0
        • late effect - see category 326
  • Change(s) (of) - see also Removal of
    • hypertrophic
      • nasal sinus (see also Sinusitis) 473.9
      • turbinate, nasal 478.0
      • upper respiratory tract 478.9
  • Degeneration, degenerative
    • nasal sinus (mucosa) (see also Sinusitis) 473.9
    • sinus (cystic) (see also Sinusitis) 473.9
  • Empyema (chest) (diaphragmatic) (double) (encapsulated) (general) (interlobar) (lung) (medial) (necessitatis) (perforating chest wall) (pleura) (pneumococcal) (residual) (sacculated) (streptococcal) (supradiaphragmatic) 510.9
    • accessory sinus (chronic) (see also Sinusitis) 473.9
    • nasal sinus (chronic) (see also Sinusitis) 473.9
    • sinus (accessory) (nasal) (see also Sinusitis) 473.9
  • Fistula (sinus) 686.9
    • accessory sinuses (see also Sinusitis) 473.9
    • nasal 478.19
      • sinus (see also Sinusitis) 473.9
  • Granuloma NEC 686.1
    • nasal sinus (see also Sinusitis) 473.9
    • sinus (accessory) (infectional) (nasal) (see also Sinusitis) 473.9
  • Hypertrophy, hypertrophic
  • Infection, infected, infective (opportunistic) 136.9
    • accessory sinus (chronic) (see also Sinusitis) 473.9
    • nasal sinus (chronic (see also Sinusitis) 473.9
    • sinus (see also Sinusitis) 473.9
  • Inflammation, inflamed, inflammatory (with exudation)
    • accessory sinus (chronic) (see also Sinusitis) 473.9
    • nasal sinus (chronic) (see also Sinusitis) 473.9
    • sinus (see also Sinusitis) 473.9
  • Lesion(s)
    • sinus (accessory) (nasal) (see also Sinusitis) 473.9
  • Obstruction, obstructed, obstructive
    • sinus (accessory) (nasal) (see also Sinusitis) 473.9
  • Perforation, perforative (nontraumatic)
    • sinus (accessory) (chronic) (nasal) (see also Sinusitis) 473.9
  • Pyocele
    • sinus (accessory) (nasal) (see also Sinusitis) 473.9
    • turbinate (bone) 473.9
  • Rhinolith 478.19
    • nasal sinus (see also Sinusitis) 473.9
  • Sequestrum
    • sinus (accessory) (nasal) (see also Sinusitis) 473.9
  • Sinusitis (accessory) (nasal) (hyperplastic) (nonpurulent) (purulent) (chronic) 473.9
    • with influenza, flu, or grippe (see also Influenza) 487.1
    • allergic (see also Fever, hay) 477.9
    • antrum - see Sinusitis, maxillary
    • influenzal (see also Influenza) 487.1
    • syphilitic, any sinus 095.8
    • tuberculous, any sinus (see also Tuberculosis) 012.8
  • Suppuration, suppurative - see also condition
    • accessory sinus (chronic) (see also Sinusitis) 473.9
    • nasal sinus (chronic) (see also Sinusitis) 473.9
    • sinus (nasal) (see also Sinusitis) 473.9
  • Trouble - see also Disease
    • sinus (see also Sinusitis) 473.9
  • Vacuum
    • in sinus (accessory) (nasal) (see also Sinusitis) 473.9
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 473.9 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.