CA0K

ICD-11 MMS 2026-01

Abscess of upper respiratory tract

Description

Abscess of upper respiratory tract is defined as abscess formation which occurs from nose to pharynx and larynx. Abscess, furuncle and carbuncle of nose, retropharyngeal, parapharyngeal abscess and other abscess of pharynx are included in this classification.

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

Child codes

  • CA0K.0 – Retropharyngeal or parapharyngeal abscess
  • CA0K.1 – Peritonsillar abscess
  • CA0K.Y – Other specified abscess of upper respiratory tract
  • CA0K.Z – Abscess of upper respiratory tract, unspecified

Sibling codes

  • CA00 – Acute nasopharyngitis
  • CA01 – Acute sinusitis
  • 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
  • CA0Y – Other specified upper respiratory tract disorders
  • CA0Z – Upper respiratory tract disorders, unspecified

Foundation entity

Abscess of upper respiratory tract – http://id.who.int/icd/entity/767797954

Allowed postcoordination axes

Part of: 12: Diseases of the respiratory system