A65 ICD-10-CM Code: Nonvenereal syphilis
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Other spirochetal diseases (A65-A69)
A65
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceNonvenereal syphilis
This is a syphilis infection that is transmitted through non-sexual contact, such as through skin-to-skin contact, contaminated objects, or poor hygiene conditions, rather than through sexual transmission. It typically occurs in areas with poor sanitation and overcrowding.
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
Official- Bejel
- Endemic syphilis
- Njovera
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A65 in this effective period.
Related Child Codes
ICD-10-CM does not list child codes under A65 for this display context.
Includes
OfficialICD-10-CM does not list Includes notes for A65 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for A65 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A65 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A65 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A65 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 A65 an HCC code?
No. A65 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
A65 is the ICD-10-CM diagnosis code for nonvenereal syphilis. This is a syphilis infection that is transmitted through non-sexual contact, such as through skin-to-skin contact, contaminated objects, or poor hygiene conditions, rather than through sexual transmission. It typically occurs in areas with poor sanitation and overcrowding. A65 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering other spirochetal diseases (a65-a69).
A65 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 in the medical record that the syphilis is documented as nonvenereal (non-sexually transmitted) to distinguish it from venereal syphilis codes (A51-A53).
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A65 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify in the medical record that the syphilis is documented as nonvenereal (non-sexually transmitted) to distinguish it from venereal syphilis codes (A51-A53)
- •This code may require additional documentation about the stage or manifestations of the disease, and coders should check for any fifth-character specificity requirements for anatomical site or stage information