CA0K.0

ICD-11 MMS 2026-01

Retropharyngeal or parapharyngeal abscess

Description

A retropharyngeal abscess is an abscess located in the tissues in the back of the throat behind the posterior pharyngeal wall (the retropharyngeal space). A parapharyngeal abscess is an abscess developing in the potential space in the head and the neck.

Index terms

  • Retropharyngeal or parapharyngeal abscess
  • Certain specified abscess of pharynx
  • abscess of pharynx
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  • pharyngeal abscess
  • throat abscess
  • Abscess of nasopharynx
  • Nasopharyngeal abscess
  • Cellulitis of pharynx
  • pharyngeal cellulitis
  • Cellulitis of nasopharynx
  • Fauces abscess
  • Thornwaldt abscess
  • Thornwaldt bursitis
  • Thornwaldt disease
  • Pharyngeal bursa abscess
  • Pharyngeal bursitis
  • Abscess of lateral pharyngeal space
  • lateral pharyngeal abscess
  • Abscess of parapharyngeal space
  • parapharyngeal abscess
  • Peripharyngeal abscess
  • Postpharyngeal abscess
  • Retropharyngeal abscess

Excludes

  • CA0K.1 – Peritonsillar abscess

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

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

Foundation entity

Retropharyngeal or parapharyngeal abscess – http://id.who.int/icd/entity/632678885

Part of: CA0K: Abscess of upper respiratory tract › 12: Diseases of the respiratory system