• nonspecific and nongonococcal urethritis (N34.1)
  • Reiter's disease (M02.3-)


  • human immunodeficiency virus [HIV] disease (B20)
  1. A51 Early syphilis

    1. A51.0 Primary genital syphilis

      Inclusion term(s):

      • Syphilitic chancre NOS
    2. A51.1 Primary anal syphilis

    3. A51.2 Primary syphilis of other sites

    4. A51.3 Secondary syphilis of skin and mucous membranes

      1. A51.31 Condyloma latum

      2. A51.32 Syphilitic alopecia

      3. A51.39 Other secondary syphilis of skin

        Inclusion term(s):

        • Syphilitic leukoderma
        • Syphilitic mucous patch
    5. A51.4 Other secondary syphilis

      1. A51.41 Secondary syphilitic meningitis

      2. A51.42 Secondary syphilitic female pelvic disease

      3. A51.43 Secondary syphilitic oculopathy

        Inclusion term(s):

        • Secondary syphilitic chorioretinitis
        • Secondary syphilitic iridocyclitis, iritis
        • Secondary syphilitic uveitis
      4. A51.44 Secondary syphilitic nephritis

      5. A51.45 Secondary syphilitic hepatitis

      6. A51.46 Secondary syphilitic osteopathy

      7. A51.49 Other secondary syphilitic conditions

        Inclusion term(s):

        • Secondary syphilitic lymphadenopathy
        • Secondary syphilitic myositis
    6. A51.5 Early syphilis, latent

      Inclusion term(s):

      • Syphilis (acquired) without clinical manifestations, with positive serological reaction and negative spinal fluid test, less than two years after infection.
    7. A51.9 Early syphilis, unspecified

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.