All ICD10 Codes
A59Non-billable

Trichomoniasis

Certain Infectious and Parasitic Diseases·Infections with a predominantly sexual mode of transmission (A50-A64)·category·FY 2026

Use a more specific code (2 billable, 1 non-billable)
A59.0Urogenital trichomoniasishas subcodesA59.8Trichomoniasis of other sitesA59.9Trichomoniasis, unspecified

CH1 Parent Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here. Use a different code.)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here. Code separately if applicable.)
  • carrier or suspected carrier of infectious disease (Z22.-)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)
Use Additional Code
  • code to identify resistance to antimicrobial drugs (Z16.-)

A50-A64 Parent Instructions

Excludes1(Not coded here. Use a different code.)
  • nonspecific and nongonococcal urethritis (N34.1)
  • Reiter's disease (M02.3-)
Excludes2(Not included here. Code separately if applicable.)
  • human immunodeficiency virus [HIV] disease (B20)

Instructional Notes

Excludes2(Not included here. Code separately if applicable.)
  • intestinal trichomoniasis (A07.8)

Clinical Hierarchy

BillableHas subcodes
CH1Certain infectious and parasitic diseases (A00-B99)
A50-A64Infections with a predominantly sexual mode of transmission (A50-A64)
A59TrichomoniasisNot billable
A59.0Urogenital trichomoniasisSubcodes
A59.8Trichomoniasis of other sitesBillable
A59.9Trichomoniasis, unspecifiedBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.