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


  • human immunodeficiency virus [HIV] disease (B20)
  1. A53 Other and unspecified syphilis

    1. A53.0 Latent syphilis, unspecified as early or late

      Inclusion term(s):

      • Latent syphilis NOS
      • Positive serological reaction for syphilis
    2. A53.9 Syphilis, unspecified

      Inclusion term(s):

      • Infection due to Treponema pallidum NOS
      • Syphilis (acquired) NOS
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.