1A61 Early syphilis

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2025-01

A disease caused by an infection with the gram-negative bacteria Treponema pallidum pallidum, including primary and secondary stages of syphilis, and early latent syphilis of less than 2 years duration. This disease is characterised by a single chancre in the primary stage, and diffuse rash in the secondary stage. Transmission is commonly by sexual contact.

exclusions

• Early congenital syphilis  (1A60)

sections/codes in this section ()

• Primary genital syphilis  (1A61.0)
• Primary anal syphilis  (1A61.1)
• Primary syphilis of other sites  (1A61.2)
• Secondary syphilis of skin or mucous membranes  (1A61.3)
• Secondary syphilis of other sites  (1A61.4)
• Latent early syphilis  (1A61.5)
• Other specified early syphilis  (1A61.Y)
• Early syphilis, unspecified  (1A61.Z)

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