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    v1.0.28
    OpenPayerBilling CodesInfections with a predominantly sexual mode of transmissionICD-10-CM a59-trichomoniasis
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    ICD-10-CM Code For Trichomoniasis: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group A59 includes diagnoses for trichomoniasis infections of the urogenital tract, including symptomatic and asymptomatic presentations caused by Trichomonas vaginalis. These ICD-10-CM diagnosis codes are used to document clinical encounters for screening, diagnosis, and management of trichomoniasis, capturing symptom presence, site of infection, and whether infection is active. Accurate coding within the ICD-10-CM A59 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM A59: Trichomoniasis Overview

    The ICD-10-CM A59 group represents infections caused by the protozoan Trichomonas vaginalis that primarily affect the urogenital tract. These diagnoses target sexually transmitted infection presentations involving the lower genital tract and associated symptoms. Accurate coding matters for correct clinical records and supports appropriate claim processing and public health surveillance.

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    When to Use

    Use a code from this group when a clinician documents a confirmed or suspected trichomoniasis infection of the urogenital tract. Codes are appropriate for encounters for screening with positive findings, diagnostic testing confirmation, and treatment visits related to trichomoniasis.

    ICD-10-CM Codes

    7 rows

    ICD-10-CM CodeDescription
    A59.00Urogenital trichomoniasis, unspecified
    A59.01Trichomonal vulvovaginitis
    A59.02Trichomonal prostatitis
    A59.03Trichomonal cystitis and urethritis
    A59.09Other urogenital trichomoniasis
    A59.8Trichomoniasis of other sites
    A59.9Trichomoniasis, unspecified

    DRG Codes

    10 rows

    DRG CodeDescription
    727Inflammation of the Male Reproductive System with MCC
    728Inflammation of the Male Reproductive System without MCC
    742Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC
    743Uterine and Adnexa Procedures for Non-Malignancy without CC/MCC
    757Infections, Female Reproductive System with MCC
    758Infections, Female Reproductive System with CC
    759Infections, Female Reproductive System without CC/MCC
    867Other Infectious and Parasitic Diseases Diagnoses with MCC
    868Other Infectious and Parasitic Diseases Diagnoses with CC
    869Other Infectious and Parasitic Diseases Diagnoses without CC/MCC

    Typical Clinical Scenarios

    • A sexually active woman in her 20s presents to urgent care with new-onset frothy, malodorous vaginal discharge, vulvar pruritus, and dysuria for 3 days. A wet prep and rapid NAAT/POC test confirm Trichomonas vaginalis infection; no signs of pelvic inflammatory disease are present. A diagnosis from this group is assigned to indicate uncomplicated vaginal trichomoniasis. Typical codes: A59.01, A59.00
    • A pregnant patient in prenatal clinic screening has a positive NAAT for Trichomonas vaginalis but reports minimal symptoms; the clinician documents trichomoniasis identified during pregnancy and discusses management implications with obstetrics. Because infection is confirmed during pregnancy, a pregnancy-associated code from the group is used to reflect trichomoniasis complicating pregnancy. Typical codes: A59.02, A59.01
    • A male patient presents to the sexually transmitted infection clinic with urethral discharge and dysuria; NAAT confirms Trichomonas vaginalis infection of the male genital tract. The visit documents trichomoniasis of the male reproductive tract and evaluation for coinfections; a code specifying trichomonal infection of the male genital organs is assigned. Typical codes: A59.03, A59.9

    Related Codes

    A50-CONGENITAL-SYPHILIS

    ICD-10-CM Code For Congenital Syphilis: Group Overview

    A51-EARLY-SYPHILIS

    ICD-10-CM Code For Early Syphilis: Group Overview

    A52-LATE-SYPHILIS

    ICD-10-CM Code For Late Syphilis: Group Overview

    A53-OTHER-AND-UNSPECIFIED-SYPHILIS

    ICD-10-CM Code For Other And Unspecified Syphilis: Group Overview

    A54-GONOCOCCAL-INFECTION

    ICD-10-CM Code For Gonococcal Infection: Group Overview

    A55-CHLAMYDIAL-LYMPHOGRANULOMA-VENEREUM

    ICD-10-CM Code For Chlamydial Lymphogranuloma (Venereum): Group Overview

    A56-OTHER-SEXUALLY-TRANSMITTED-CHLAMYDIAL-DISEASES

    ICD-10-CM Code For Other Sexually Transmitted Chlamydial Diseases: Group Overview

    A57-CHANCROID

    ICD-10-CM Code For Chancroid: Group Overview

    A58-GRANULOMA-INGUINALE

    ICD-10-CM Code For Granuloma Inguinale: Group Overview

    A60-ANOGENITAL-HERPESVIRAL-INFECTIONS

    ICD-10-CM Code For Anogenital Herpesviral Infections: Group Overview

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    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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