A52.17 ICD-10-CM Code: General paresis
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Infections with a predominantly sexual mode of transmission (A50-A64)
A52.17
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceGeneral paresis
General paresis is a late-stage complication of untreated syphilis where the bacteria damages the brain and spinal cord, causing progressive mental decline, personality changes, and neurological symptoms. This condition, also known as neurosyphilis, can lead to dementia, paralysis, and severe psychiatric symptoms if left untreated.
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
Official- Dementia paralytica
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A52.17 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for A52.17 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for A52.17 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A52.17 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A52.17 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A52.17 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 A52.17 an HCC code?
No. A52.17 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
A52.17 is the ICD-10-CM diagnosis code for general paresis. General paresis is a late-stage complication of untreated syphilis where the bacteria damages the brain and spinal cord, causing progressive mental decline, personality changes, and neurological symptoms. This condition, also known as neurosyphilis, can lead to dementia, paralysis, and severe psychiatric symptoms if left untreated. A52.17 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering infections with a predominantly sexual mode of transmission (a50-a64).
A52.17 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.
A52.17 is a component of neurosyphilis; verify documentation confirms CNS involvement and stage of syphilis to ensure accurate coding.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A52.17 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •A52.17 is a component of neurosyphilis; verify documentation confirms CNS involvement and stage of syphilis to ensure accurate coding
- •This code should be paired with documentation of the underlying syphilis infection and any associated psychiatric or neurological manifestations for complete clinical picture