A06.9 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools

ICD-10-CM Code View

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Code lookupA06.9

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Intestinal infectious diseases (A00-A09)

A06.9

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Amebiasis, unspecified

Amebiasis is an infection caused by a parasite called Entamoeba histolytica, which is typically acquired by drinking contaminated water or eating contaminated food. This code is used when the specific type or location of the amebic infection is not documented.

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

N/A

—

Not risk-adjusted for this model/period.

Not mapped

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

A06Amebiasis A06.9Amebiasis, unspecified

Inclusion Terms

Official

No inclusion terms are included in this display for A06.9. Check the code and parent instructions in the Code Book.

Excludes 2

Official

carrier or suspected carrier of infectious disease (Z22.-)Inherited from A00-B99, A06
infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)Inherited from A00-B99, A06
infectious and parasitic diseases specific to the perinatal period (P35-P39)Inherited from A00-B99, A06
influenza and other acute respiratory infections (J00-J22)Inherited from A00-B99, A06
acanthamebiasis (B60.1-)Inherited from A00-B99, A06
Naegleriasis (B60.2)Inherited from A00-B99, A06

Related Codes

Official

A06.0Acute amebic dysentery A06.1Chronic intestinal amebiasis A06.2Amebic nondysenteric colitis A06.3Ameboma of intestine A06.4Amebic liver abscess

Includes

Official

diseases generally recognized as communicable or transmissibleInherited from A00-B99, A06
infection due to Entamoeba histolyticaInherited from A00-B99, A06

Excludes 1

Official

certain localized infections - see body system-related chaptersInherited from A00-B99, A06
other protozoal intestinal diseases (A07.-)Inherited from A00-B99, A06

Code First

Official

No Code First sequencing instructions are included in this display for A06.9. Check the code and parent instructions in the Code Book.

Use Additional

Official

code to identify resistance to antimicrobial drugs (Z16.-)Inherited from A00-B99

Code Also

Official

No Code Also instructions are included in this display for A06.9. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance

Use this unspecified code only when the medical record does not indicate the specific site of infection (such as intestinal, liver, or other organs); if the site is documented, use a more specific A06 code

This code is typically associated with travel history to endemic areas or consumption of contaminated food/water; review documentation for any specified complications or organ involvement that would warrant a more specific diagnosis code

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is A06.9 an HCC code?

No. A06.9 is a billable ICD-10-CM code with no mapping under the current CMS-HCC V28 community payment model, and none under the ESRD, Part D RxHCC, or HHS-HCC models.

Code: A06.9
Description: Amebiasis, unspecified
HCC (V28): No CMS-HCC V28 mapping
RAF reference coefficient: —
Billable: Yes
Payment year: 2026

Coder workflow notes

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What This Code Means

A06.9 is the ICD-10-CM diagnosis code for amebiasis, unspecified. Amebiasis is an infection caused by a parasite called Entamoeba histolytica, which is typically acquired by drinking contaminated water or eating contaminated food. This code is used when the specific type or location of the amebic infection is not documented. A06.9 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering intestinal infectious diseases (a00-a09).

A06.9 is a billable ICD-10-CM code, but no current CMS-HCC V28 community payment mapping is shown, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for A06.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Use this unspecified code only when the medical record does not indicate the specific site of infection (such as intestinal, liver, or other organs); if the site is documented, use a more specific A06 code
•This code is typically associated with travel history to endemic areas or consumption of contaminated food/water; review documentation for any specified complications or organ involvement that would warrant a more specific diagnosis code