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


  • human immunodeficiency virus [HIV] disease (B20)
  1. A56 Other sexually transmitted chlamydial diseases


    • sexually transmitted diseases due to Chlamydia
    • trachomatis


    • neonatal chlamydial conjunctivitis (P39.1)
    • neonatal chlamydial pneumonia (P23.1)


    • chlamydial lymphogranuloma (A55)
    • conditions classified to A74.-
    1. A56.0 Chlamydial infection of lower genitourinary tract

      1. A56.00 Chlamydial infection of lower genitourinary tract, unspecified

      2. A56.01 Chlamydial cystitis and urethritis

      3. A56.02 Chlamydial vulvovaginitis

      4. A56.09 Other chlamydial infection of lower genitourinary tract

        Inclusion term(s):

        • Chlamydial cervicitis
    2. A56.1 Chlamydial infection of pelviperitoneum and other genitourinary organs

      1. A56.11 Chlamydial female pelvic inflammatory disease

      2. A56.19 Other chlamydial genitourinary infection

        Inclusion term(s):

        • Chlamydial epididymitis
        • Chlamydial orchitis
    3. A56.2 Chlamydial infection of genitourinary tract, unspecified

    4. A56.3 Chlamydial infection of anus and rectum

    5. A56.4 Chlamydial infection of pharynx

    6. A56.8 Sexually transmitted chlamydial infection of other sites

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.