CA01

ICD-11 MMS 2026-01

Acute sinusitis

Description

Recent onset and/or short duration inflammation of the mucosa in one or more of the paranasal sinuses (maxillary, ethmoid, frontal and sphenoid) arising from infection or other causes such as caries or injury to the teeth. Purulent discharge can be seen at the middle meatus and olfactory cleavage and patients complain of dysosmia, stuffy nose, fever, or localised tenderness or pain. Allergic rhinitis, nasal septum deformity or hypertrophic rhinitis are underlying diseases that may induce acute sinusitis.

Index terms

  • Acute sinusitis
  • acute infection of sinus
  • acute inflammation of sinus
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  • acute rhinosinusitis
  • acute sinusitis NOS
  • Acute maxillary sinusitis
  • Acute antritis
  • acute maxilla sinusitis
  • Acute frontal sinusitis
  • Acute ethmoidal sinusitis
  • acute ethmoid sinusitis
  • acute ethmoiditis
  • Acute sphenoidal sinusitis
  • Acute pansinusitis
  • acute sinusitis involving all sinuses
  • Sinusitis due to Streptococcus pneumoniae
  • Acute infection of accessory sinus
  • acute inflammation of accessory sinus
  • Acute abscess of accessory sinus
  • acute accessory sinus abscess
  • Acute empyema of accessory sinus
  • acute suppuration of accessory sinus
  • Acute infection of nasal sinus
  • acute inflammation of nasal sinus
  • Acute abscess of nasal sinus
  • Acute empyema of nasal sinus
  • acute suppuration of nasal sinus
  • Acute sinusitis involving more than one sinus but not pansinusitis

Excludes

  • CA0A – sinusitis, chronic or NOS

Exclusions from above levels

  • CA22.0 – Chronic obstructive pulmonary disease with acute exacerbation, unspecified
  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
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  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
  • 20 – Congenital malformations, deformations and chromosomal abnormalities
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • CA00 – Acute nasopharyngitis
  • CA02 – Acute pharyngitis
  • CA03 – Acute tonsillitis
  • CA04 – Acute laryngopharyngitis
  • CA05 – Acute laryngitis or tracheitis
  • CA06 – Acute obstructive laryngitis or epiglottitis
  • CA07 – Acute upper respiratory infections of multiple and unspecified sites
  • CA08 – Vasomotor or allergic rhinitis
  • CA09 – Chronic rhinitis, nasopharyngitis or pharyngitis
  • CA0A – Chronic rhinosinusitis
  • CA0B – Silent sinus syndrome
  • CA0C – Cyst or mucocele of nose or nasal sinus
  • CA0D – Deviated nasal septum
  • CA0E – Hypertrophy of nasal turbinates
  • CA0F – Chronic diseases of tonsils or adenoids
  • CA0G – Chronic laryngitis or laryngotracheitis
  • CA0H – Diseases of vocal cords or larynx, not elsewhere classified
  • CA0J – Nasal polyp
  • CA0K – Abscess of upper respiratory tract
  • CA0Y – Other specified upper respiratory tract disorders
  • CA0Z – Upper respiratory tract disorders, unspecified

Foundation entity

Acute sinusitis – http://id.who.int/icd/entity/509821856

Allowed postcoordination axes

Part of: 12: Diseases of the respiratory system