1A61.0

ICD-11 MMS 2026-01

Primary genital syphilis

Description

A disease caused by an infection with the gram-negative bacteria Treponema pallidum pallidum. This disease is characterised by a single chancre in the genital region. Transmission is commonly by sexual contact.

Index terms

  • Primary genital syphilis
  • Genital syphilitic chancre
  • Syphilitic chancre NOS
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  • chancre
  • genital chancre
  • genital syphilis
  • mixed chancre
  • primary syphilis
  • primary syphilitic chancre
  • syphilitic bubo
  • syphilitic chancre
  • syphilitic rollet chancre
  • venereal inguinal bubo
  • Syphilis of penis
  • syphilitic chancre of penis
  • syphilitic penis
  • Syphilis of vagina
  • syphilitic vagina
  • syphilitic vaginitis
  • Syphilitic vulvitis
  • Urethral chancre

Exclusions from above levels

  • 1A60.Z – Early congenital syphilis
  • FA11.2 – Arthropathy following genitourinary infection
  • GC02.1 – Nonspecific and nongonococcal urethritis
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  • NE83.1 – Infection arising from device, implant or graft, not elsewhere classified

Sibling codes

  • 1A61.1 – Primary anal syphilis
  • 1A61.2 – Primary syphilis of other sites
  • 1A61.3 – Secondary syphilis of skin or mucous membranes
  • 1A61.4 – Secondary syphilis of other sites
  • 1A61.5 – Latent early syphilis
  • 1A61.Y – Other specified early syphilis
  • 1A61.Z – Early syphilis, unspecified

Foundation entity

Primary genital syphilis – http://id.who.int/icd/entity/191565955

Allowed postcoordination axes

Part of: 1A61: Early syphilis › 01: Certain infectious or parasitic diseases