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ICD-10-CM 2027 · A50-A64

Infections with a predominantly sexual mode of transmission

Part of chapter 1, certain infectious and parasitic diseases.

About A50-A64

Block A50-A64 contains 13 categories and 142 billable codes for FY2027. No codes here changed in the FY2027 update. 7 codes are MCCs and 89 are CCs when reported as secondary diagnoses.

A50Congenital syphilis

A51Early syphilis

A52Late syphilis

A53Other and unspecified syphilis

A54Gonococcal infection

A55Chlamydial lymphogranuloma (venereum)

A56Other sexually transmitted chlamydial diseases

A57Chancroid

A58Granuloma inguinale

A59Trichomoniasis

A60Anogenital herpesviral [herpes simplex] infections

A63Other predominantly sexually transmitted diseases, not elsewhere classified

A64Unspecified sexually transmitted disease

Block notes

Excludes1
  • nonspecific and nongonococcal urethritis (N34.1)
  • Reiter's disease (M02.3-)
Excludes2
  • human immunodeficiency virus [HIV] disease (B20)