A51 - Early syphilis
A51.0 - Primary genital syphilis
A51.1 - Primary anal syphilis
A51.2 - Primary syphilis of other sites
A51.3 - Secondary syphilis of skin and mucous membranes
A51.31 - Condyloma latum
A51.32 - Syphilitic alopecia
A51.39 - Other secondary syphilis of skin
A51.4 - Other secondary syphilis
A51.41 - Secondary syphilitic meningitis
A51.42 - Secondary syphilitic female pelvic disease
A51.43 - Secondary syphilitic oculopathy
A51.44 - Secondary syphilitic nephritis
A51.45 - Secondary syphilitic hepatitis
A51.46 - Secondary syphilitic osteopathy
A51.49 - Other secondary syphilitic conditions
A51.5 - Early syphilis, latent
A51.9 - Early syphilis, unspecified