1B51

ICD-11 MMS 2026-01

Streptococcal pharyngitis

Description

A disease of the pharynx, caused by an infection with the gram-positive bacteria Streptococcus pyogenes. This disease is characterised by fever, sore throat, tonsillar exudates, or large cervical lymph nodes. Transmission is commonly by inhalation of infected respiratory secretions, or indirect contact. Confirmation is by identification of Streptococcus pyogenes from a throat swab.

Index terms

  • Streptococcal pharyngitis
  • Streptococcal sore throat
  • septic angina
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  • septic pharyngitis
  • septic sore throat
  • septic sore throat due to streptococcal infection
  • strep throat
  • streptococcal angina
  • streptococcal septic sore throat
  • streptococcal ulcerated sore throat
  • Acute streptococcal pharyngitis
  • acute streptococcal sore throat
  • acute streptococcal ulcerated sore throat

Inclusions

  • Streptococcal sore throat

Excludes

  • 1B50 – Scarlet fever

Exclusions from above levels

  • NE83.1 – Infection arising from device, implant or graft, not elsewhere classified

Sibling codes

  • 1B50 – Scarlet fever
  • 1B53 – Meningitis due to Streptococcus
  • 1B54 – Meningitis due to Staphylococcus
  • 1B5Y – Other specified staphylococcal or streptococcal diseases
  • 1B5Z – Staphylococcal or streptococcal diseases, unspecified

Foundation entity

Streptococcal pharyngitis – http://id.who.int/icd/entity/1642172022

Allowed postcoordination axes

Part of: 01: Certain infectious or parasitic diseases