2026 ICD-10-CM Diagnosis Code A06.2Amebic nondysenteric colitis

ICD-10-CM Codes›A00–B99›A00-A09›A06

ICD-10-CM A06.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A06.2 is a billable ICD-10-CM diagnosis code for amebic nondysenteric colitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 371 through 373. Coders also document this condition as amebic colitis. 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
A06.2
Billable Status
Yes — Valid for Submission
Code Describes
Amebic nondysenteric colitis
Short Description
Amebic nondysenteric colitis
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 CodeA06.2Amebic nondysenteric colitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Amebic colitis
  • Amebic nondysenteric colitis
  • Colitis caused by protozoan
  • Parasitic infection causing colitis

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
      • nondysenteric colitis
    • Colitis(acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)
      • amebic (acute)
        • nondysenteric
    • Diarrhea, diarrheal(disease) (infantile) (inflammatory)
      • amebic
        • nondysenteric
    • Enteritis(acute) (diarrheal) (hemorrhagic) (noninfective)
      • amebic (acute)
        • chronic
          • nondysenteric
    • Enteritis(acute) (diarrheal) (hemorrhagic) (noninfective)
      • amebic (acute)
        • nondysenteric

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

  • Amebic Colitis

    colitis resulting from amebic infection.

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 A06.2 to ICD-9-CMHistory

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

ICD-9-CM
006.2 Amebic nondysent colitis
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 A06.2Overview

Is A06.2 (Amebiasis) a billable code?

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

What MS-DRG does A06.2 group to?

When amebic nondysenteric colitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 371, 372, 373, with relative weights from 0.7274 to 1.7731 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of A06.2?

Under the General Equivalence Mappings, amebic nondysenteric colitis converts to ICD-9-CM 006.2 (amebic nondysent colitis). 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.