473.9 CHRONIC SINUSITIS NOS


Code Information

Diagnosis Code: 473.9

Short Description: Chronic sinusitis NOS

Long Description: Unspecified sinusitis (chronic)

Code Classification:

  • Diseases of the respiratory system (460–519)
    • Other diseases of upper respiratory tract (470-478)
      • 473 Chronic sinusitis
        • 473.9 Chronic sinusitis NOS

Code Version: 2015 ICD-9-CM


References to Index of Diseases and Injuries

The code 473.9 has the following ICD-9-CM references to the Index of Diseases and Injuries
  • 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
    • 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
  • Beats
  • Change(s) (of) - see also Removal of
    • hypertrophic
      • nasal sinus (see also Sinusitis) 473.9
  • Degeneration, degenerative
    • nasal sinus (mucosa) (see also Sinusitis) 473.9
      • frontal 473.1
      • maxillary 473.0
    • sinus (cystic) (see also Sinusitis) 473.9
      • polypoid 471.1
  • 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
    • nasal 478.19
      • sinus (see also Sinusitis) 473.9
  • 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
      • pilonidal 685.1
        • with abscess 685.0
      • skin NEC 686.9
  • 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)
    • nasal
      • sinus (see also Sinusitis) 473.9
        • congenital 748.1
    • 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
      • maxillary 473.0
  • Sinusitis (accessory) (nasal) (hyperplastic) (nonpurulent) (purulent) (chronic) 473.9
    • with influenza, flu, or grippe (see also Influenza) 487.1
    • acute 461.9
      • ethmoidal 461.2
      • frontal 461.1
      • maxillary 461.0
      • specified type NEC 461.8
      • sphenoidal 461.3
    • allergic (see also Fever, hay) 477.9
    • antrum - see Sinusitis, maxillary
    • due to
      • fungus, any sinus 117.9
      • high altitude 993.1
    • ethmoidal 473.2
      • acute 461.2
    • frontal 473.1
      • acute 461.1
    • influenzal (see also Influenza) 487.1
    • maxillary 473.0
      • acute 461.0
    • specified site NEC 473.8
    • sphenoidal 473.3
      • acute 461.3
    • 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

Crosswalk Information

The code 473.9 converts into the following ICD-10 code(s):
ICD-9 Code ICD-10 Code ICD-10 Description
473.9 Right Arrow J32.9 Chronic sinusitis, unspecified
This ICD-9 to ICD-10 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-9 Code ICD-9 Description
473.0 Chronic maxillary sinusitis
473.1 Chronic frontal sinusitis
473.2 Chronic ethmoidal sinusitis
473.3 Chronic sphenoidal sinusitis
473.8 Other chronic sinusitis


This page was last updated on: 10/1/2014