A06.2 ICD-10-CM Code: Amebic nondysenteric colitis
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Intestinal infectious diseases (A00-A09)
A06.2
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAmebic nondysenteric colitis
This is an infection of the colon caused by a parasite called ameba that causes inflammation and symptoms like abdominal pain and diarrhea, but without the severe bloody diarrhea seen in amebic dysentery. The infection occurs when someone ingests contaminated food or water containing the ameba parasite.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for A06.2 in this effective period.
Excludes 2
Official- acanthamebiasis (B60.1-)
- Naegleriasis (B60.2)
Related Child Codes
Includes
Official- infection due to Entamoeba histolytica
Excludes 1
Official- other protozoal intestinal diseases (A07.-)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A06.2 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A06.2 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A06.2 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is A06.2 an HCC code?
No. A06.2 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A06.2 is the ICD-10-CM diagnosis code for amebic nondysenteric colitis. This is an infection of the colon caused by a parasite called ameba that causes inflammation and symptoms like abdominal pain and diarrhea, but without the severe bloody diarrhea seen in amebic dysentery. The infection occurs when someone ingests contaminated food or water containing the ameba parasite. A06.2 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering intestinal infectious diseases (a00-a09).
A06.2 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Verify that the documentation specifies 'nondysenteric' colitis to distinguish from amebic dysentery (A06.0), as the distinction affects treatment and severity coding.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A06.2 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify that the documentation specifies 'nondysenteric' colitis to distinguish from amebic dysentery (A06.0), as the distinction affects treatment and severity coding
- •Confirm the ameba infection is localized to the colon; if it has spread to other organs like the liver or lungs, use different A06 codes (A06.4, A06.5, A06.8, A06.9)