2026 ICD-10-CM Diagnosis Code A06.81Amebic cystitis

ICD-10-CM Codes›A00–B99›A00-A09›A06

ICD-10-CM A06.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A06.81 is a billable ICD-10-CM diagnosis code for amebic cystitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 867 through 869. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
A06.81
Billable Status
Yes — Valid for Submission
Code Describes
Amebic cystitis
Short Description
Amebic cystitis
Same as the full description in the CMS dataset.
Parent Code
A06.8
Amebic infection of other sites

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA00-A09Intestinal infectious diseases
CategoryA06Amebiasis
This CodeA06.81Amebic cystitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Amebic cystitis

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.

    • Amebiasis
      • cystitis
    • Cystitis(exudative) (hemorrhagic) (septic) (suppurative)
      • amebic

Clinical ClassificationClinical

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

CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Parasitic Diseases

Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not.

Read the full article at MedlinePlus

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

Convert A06.81 to ICD-9-CMHistory

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

ICD-9-CM
006.8 Amebic infection NEC
Approximate The match is approximate rather than exact.

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 A06.81Overview

Is A06.81 (Amebic infection of other sites) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report amebic cystitis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does A06.81 group to?

When amebic cystitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 868, 869, with relative weights from 0.7297 to 2.0932 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of A06.81?

Under the General Equivalence Mappings, amebic cystitis converts to ICD-9-CM 006.8 (amebic infection NEC). The mapping is approximate, so confirm the match fits the documentation.

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.