A71.9 ICD-10-CM Code: Trachoma, unspecified
HCC Buddy Code Card
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Other diseases caused by chlamydiae (A70-A74)
A71.9
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceTrachoma, unspecified
Trachoma is a chronic eye infection caused by bacteria that can lead to blindness if untreated. This code is used when the specific type or stage of trachoma has not been documented.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for A71.9 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A71.9 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for A71.9 in this effective period.
Excludes 1
Official- sequelae of trachoma (B94.0)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A71.9 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A71.9 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A71.9 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 A71.9 an HCC code?
No. A71.9 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A71.9 is the ICD-10-CM diagnosis code for trachoma, unspecified. Trachoma is a chronic eye infection caused by bacteria that can lead to blindness if untreated. This code is used when the specific type or stage of trachoma has not been documented. A71.9 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering other diseases caused by chlamydiae (a70-a74).
A71.9 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.
Query the provider if more specific trachoma information is available (active trachoma, trachomatous trichiasis, trachomatous scarring, etc.) as codes A71.0-A71.8 provide greater specificity.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A71.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Query the provider if more specific trachoma information is available (active trachoma, trachomatous trichiasis, trachomatous scarring, etc.) as codes A71.0-A71.8 provide greater specificity
- •Trachoma is primarily found in developing countries with poor sanitation; verify the patient's travel history or geographic origin to support medical necessity if questioned