2026 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 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A59.02 is a billable ICD-10-CM diagnosis code for trichomonal prostatitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) 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

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Infection, infected, infective(opportunistic)
      • Trichomonas
        • prostate
    • Prostatitis(congestive) (suppurative) (with cystitis)
      • due to Trichomonas (vaginalis)
    • Prostatitis(congestive) (suppurative) (with cystitis)
      • trichomonal
    • Trichomoniasis
      • prostate

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

  • Acute Prostatitis

    an acute inflammatory process that affects the prostate gland. it is caused by bacteria, most often escherichia coli, proteus mirabilis, klebsiella, and pseudomonas aeruginosa.

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.

The full article covers:

  • What is the prostate?
  • What are prostate diseases?
  • Who is more likely to develop prostate diseases?
  • What are the symptoms of prostate diseases?
  • How are prostate diseases diagnosed?

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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About A59.02Overview

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, 2025 through September 30, 2026.

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 0.8112 to 1.4829 depending on complications. Higher weights mean higher Medicare reimbursement.

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.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.