Trichomoniasis (A59) ICD-10-CM
The A59 code range covers trichomoniasis with 9 ICD-10-CM diagnosis codes. 7 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- intestinal trichomoniasis A07.8
Codes in the A59 Range 9 codes · 7 billable
- A59 TrichomoniasisNon-billable
- A59.0 Urogenital trichomoniasisNon-billable
- A59.00 Urogenital trichomoniasis, unspecified
- A59.01 Trichomonal vulvovaginitis
- A59.02 Trichomonal prostatitis
- A59.03 Trichomonal cystitis and urethritis
- A59.09 Other urogenital trichomoniasis
- A59.8 Trichomoniasis of other sites
- A59.9 Trichomoniasis, unspecified
About the A59 Code Range
The ICD-10 code for trichomoniasis is centered around the parasitic infection caused by the protozoan Trichomonas vaginalis, primarily affecting the urogenital tract. These codes, starting with A59, categorize the infection based on the specific site and nature of the condition.
The A59 series captures variations of trichomoniasis, such as urogenital trichomoniasis (A59.0), including detailed distinctions like unspecified urogenital infection (A59.00) and trichomonal vulvovaginitis (A59.01), which is a female genital infection. Other codes specify inflammation of male organs like trichomonal prostatitis (A59.02), and urinary tract infections such as trichomonal cystitis and urethritis (A59.03). Additional codes cover other urogenital areas (A59.09) and trichomoniasis involving sites beyond the genitals (A59.8), like balanitis or balanoposthitis. For cases where the diagnosis is uncertain or not specifically categorized, A59.9 is used for unspecified trichomoniasis. Using these codes allows healthcare providers and coders to accurately document and identify infections related to Trichomonas vaginalis, also referred to in synonyms such as "female genital Trichomonas vaginalis infection," "trichomonal vaginitis," or "infection by Trichomonas." This ensures precise classification for treatment and epidemiological tracking.
Questions About This Page
How many billable codes are in the A59 range?
Of the 9 codes in this range, 7 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the A59 range classify?
The range classifies trichomoniasis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
