2027 ICD-10-CM Diagnosis Code A59.02Trichomonal prostatitis

ICD-10-CM Codes›A00–B99›A50-A64›A59

ICD-10-CM A59.02
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

A59.02 is a billable ICD-10-CM diagnosis code for trichomonal prostatitis. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 727 through 728. Coders also document this condition as acute prostatitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Inflammatory conditions of male genital organs; Parasitic, other specified and unspecified infections; and Sexually transmitted infections (excluding HIV and hepatitis).

Code Identity

ICD-10-CM Code
A59.02
Billable Status
Yes — Valid for Submission
Code Describes
Trichomonal prostatitis
Short Description
Trichomonal prostatitis
Same as the full description in the CMS dataset.
Parent Code
A59.0
Urogenital trichomoniasis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA50-A64Infections with a predominantly sexual mode of transmission
CategoryA59Trichomoniasis
This CodeA59.02Trichomonal prostatitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute prostatitis
  • Trichomonal prostatitis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to A59.02: its own notes plus those printed at A59, block A50-A64, and Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block A50-A64 Infections with a predominantly sexual mode of transmission applies to 142 codes
  • nonspecific and nongonococcal urethritis (N34.1)
  • Reiter's disease (M02.3-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From A59 Trichomoniasis applies to 7 codes
  • intestinal trichomoniasis (A07.8)
From Block A50-A64 Infections with a predominantly sexual mode of transmission applies to 142 codes
  • human immunodeficiency virus [HIV] disease (B20)
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • 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

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name A59.02, its category, or a range that includes it.

Applicable To 1

These notes mention A59.02.

  • O98.3 Other infections with a predominantly sexual mode of transmission complicating pregnancy, childbirth and the puerperium
    Conditions in A55-A64 names A55-A64, which includes this code

Excludes1 1

These codes carry an Excludes1 note naming A59.02: they are not reported together with it, unless the two conditions are unrelated.

  • N51 Disorders of male genital organs in diseases classified elsewhere
    trichomonal prostatitis (A59.02)

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR GEN013
Inflammatory conditions of male genital organs
Default principal diagnosis: inpatient No · outpatient No
CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient No · outpatient No
CCSR INF010
Sexually transmitted infections (excluding HIV and hepatitis)
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Trichomonas Infections

    infections in birds and mammals produced by various species of trichomonas.

Patient EducationClinical

Prostate Diseases

The prostate is a gland in the male reproductive system. It lies just below the bladder. It makes fluid that is part of semen.

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Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert A59.02 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
131.03 Trichomonal prostatitis
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About A59.02Overview

What is the ICD-10 code for trichomonal prostatitis?

The ICD-10-CM code for trichomonal prostatitis is A59.02 (sometimes written as A5902). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is A59.02 (Urogenital trichomoniasis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report trichomonal prostatitis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does A59.02 group to?

When trichomonal prostatitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 727, 728, with relative weights from 0.8220 to 1.3694 depending on complications. Higher weights mean higher Medicare reimbursement.

Can A59.02 be reported with N34.1?

Not as a rule. The Excludes1 note at block A50-A64, which applies to A59.02, lists "nonspecific and nongonococcal urethritis (N34.1)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of A59.02?

Under the General Equivalence Mappings, trichomonal prostatitis converts to ICD-9-CM 131.03 (trichomonal prostatitis). The mapping is a direct match.