A52.02 ICD-10-CM Code: Syphilitic aortitis
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) / Infections with a predominantly sexual mode of transmission (A50-A64)
A52.02
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceSyphilitic aortitis
This is an infection of the aorta (the main blood vessel leaving the heart) caused by syphilis, a sexually transmitted bacterial infection. The infection causes inflammation and damage to the aorta's walls, which can lead to serious complications if 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
Basket needed
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for A52.02 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A52.02 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for A52.02 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for A52.02 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A52.02 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A52.02 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A52.02 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 A52.02 an HCC code?
No. A52.02 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
Get the V28 RAF + MEAT cheat sheet
One printable page: confirm a code's V28 HCC status, its RAF weight, and the MEAT your note needs to make it stick. Free, no card.
Free PDF. No card. Unsubscribe anytime.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A52.02 is the ICD-10-CM diagnosis code for syphilitic aortitis. This is an infection of the aorta (the main blood vessel leaving the heart) caused by syphilis, a sexually transmitted bacterial infection. The infection causes inflammation and damage to the aorta's walls, which can lead to serious complications if untreated. A52.02 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).
A52.02 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 syphilis has been confirmed as the underlying cause of the aortitis before coding A52.02; this is a late manifestation of syphilis requiring documentation of the syphilitic infection.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A52.02 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify that syphilis has been confirmed as the underlying cause of the aortitis before coding A52.02; this is a late manifestation of syphilis requiring documentation of the syphilitic infection
- •Do not use this code for aortitis from other causes; ensure the aortic inflammation is specifically documented as syphilitic in origin