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A50.2 ICD-10-CM Code: Early congenital syphilis, unspecified

A50.2 is not a CMS-HCC payment code. MEAT criteria · RAF calculator · HCC coding software

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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)

A50.2

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

Early congenital syphilis, unspecified

This code describes syphilis that was passed from mother to baby during pregnancy or birth, but the specific type or stage is not documented. It is used when a newborn or young child has congenital syphilis without more specific details about which organs or systems are affected.

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

Official
A50Congenital syphilis
A50.2Early congenital syphilis, unspecified

Inclusion Terms

Official
  • Congenital syphilis NOS less than two years after birth.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for A50.2 in this effective period.

Related Child Codes

Official
A50.0Early congenital syphilis, symptomatic
A50.1Early congenital syphilis, latent
A50.3Late congenital syphilitic oculopathy
A50.4Late congenital neurosyphilis [juvenile neurosyphilis]
A50.5Other late congenital syphilis, symptomatic

Includes

Official

ICD-10-CM does not list Includes notes for A50.2 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for A50.2 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for A50.2 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for A50.2 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for A50.2 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance
Use this code only when the documentation does not specify the manifestations of early congenital syphilis; if specific organs are involved (such as neurosyphilis, osteochondropathy, or mucocutaneous lesions), use the more specific A50.0x codes instead
Verify that the patient is documented as having congenital syphilis (acquired in utero or during birth) rather than acquired syphilis, as this affects code selection and typically requires documentation of maternal syphilis status

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 A50.2 an HCC code?

No. A50.2 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.

Code
A50.2
Description
Early congenital syphilis, unspecified
HCC (V28)
No CMS-HCC V28 mapping
RAF
Billable
Yes
Payment year
2026

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

A50.2 is the ICD-10-CM diagnosis code for early congenital syphilis, unspecified. This code describes syphilis that was passed from mother to baby during pregnancy or birth, but the specific type or stage is not documented. It is used when a newborn or young child has congenital syphilis without more specific details about which organs or systems are affected. A50.2 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).

A50.2 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.

Use this code only when the documentation does not specify the manifestations of early congenital syphilis; if specific organs are involved (such as neurosyphilis, osteochondropathy, or mucocutaneous lesions), use the more specific A50.0x codes instead.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A50.2 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

  • Use this code only when the documentation does not specify the manifestations of early congenital syphilis; if specific organs are involved (such as neurosyphilis, osteochondropathy, or mucocutaneous lesions), use the more specific A50.0x codes instead
  • Verify that the patient is documented as having congenital syphilis (acquired in utero or during birth) rather than acquired syphilis, as this affects code selection and typically requires documentation of maternal syphilis status

Child Codes

Code Hierarchy

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