ICD-10 Code for Trichomoniasis
The ICD-10-CM code for trichomoniasis is A59.9 — Trichomoniasis, unspecified. This is the code the Alphabetic Index gives for trichomoniasis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
A59.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which trichomoniasis code should you use?
The Alphabetic Index lists 8 codes under Trichomoniasis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| bladder | A59.03 | Trichomonal cystitis and urethritis | |
| cervix | A59.09 | Other urogenital trichomoniasis | |
| intestinal | A07.8 | Other specified protozoal intestinal diseases | |
| prostate | A59.02 | Trichomonal prostatitis | |
| seminal vesicles | A59.09 | Other urogenital trichomoniasis | |
| specified site NEC | A59.8 | Trichomoniasis of other sites | |
| urethra | A59.03 | Trichomonal cystitis and urethritis | |
| urogenitalis | A59.00 | Urogenital trichomoniasis, unspecified | |
| vagina | A59.01 | Trichomonal vulvovaginitis | |
| vulva | A59.01 | Trichomonal vulvovaginitis |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources