2026 ICD-10-CM Diagnosis Code A06.3Ameboma of intestine

ICD-10-CM Codes›A00–B99›A00-A09›A06

ICD-10-CM A06.3
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A06.3 is a billable ICD-10-CM diagnosis code for ameboma of intestine. 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. Coders also document this condition as ameboma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Intestinal infection; and Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
A06.3
Billable Status
Yes — Valid for Submission
Code Describes
Ameboma of intestine
Short Description
Ameboma of intestine
Same as the full description in the CMS dataset.
Parent Code
A06
Amebiasis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA00-A09Intestinal infectious diseases
CategoryA06Amebiasis
This CodeA06.3Ameboma of intestine

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Ameboma
  • Ameboma of intestine
  • Ameboma of large intestine caused by Entamoeba histolytica
  • Ameboma of small intestine
  • Secondary acquired megacolon
  • Toxic megacolon due to amebic infection
  • Toxic state
  • Toxic state due to colonic dilatation

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Ameboma NOS

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.

    • Ameboma(of intestine)

Clinical ClassificationClinical

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

CCSR DIG001
Intestinal infection
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Amebiasis

    infection with any of various amebae. it is an asymptomatic carrier state in most individuals, but diseases ranging from chronic, mild diarrhea to fulminant dysentery may occur.

  • Dysentery, Amebic

    dysentery caused by intestinal amebic infection, chiefly with entamoeba histolytica. this condition may be associated with amebic infection of the liver and other distant sites.

  • Liver Abscess, Amebic

    single or multiple areas of pus due to infection by any ameboid protozoa (amebiasis). a common form is caused by the ingestion of entamoeba histolytica.

  • Amebiasis|Amoebiasis|Amoebiasis

    a parasitic infection of the colon by entamoeba histolytica. signs and symptoms include cramping, diarrhea, bloody stools and fever. it can be treated with antibiotics.

  • Amebiasis

    a parasitic infectious disorder caused by amoebas. the parasite may cause colitis which is manifested with bloody diarrhea, abdominal pain, nausea and fever. in rare cases it may spread to the liver, brain and lungs.

Patient EducationClinical

Gastroenteritis

Gastroenteritis is an inflammation of the lining of the stomach and intestines. The main symptoms include vomiting and diarrhea. It is usually not serious in healthy people, but it can sometimes lead to dehydration or cause severe symptoms.

The full article covers:

  • What is gastroenteritis?
  • What causes gastroenteritis?
  • What are the symptoms of gastroenteritis?
  • How is gastroenteritis diagnosed?
  • What are the treatments for gastroenteritis?
  • Can gastroenteritis be prevented?

Read the full article at MedlinePlus

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

Convert A06.3 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 A06.3Overview

Is A06.3 (Amebiasis) a billable code?

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

What MS-DRG does A06.3 group to?

When ameboma of intestine 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 A06.3?

Under the General Equivalence Mappings, ameboma of intestine 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.