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ICD-10-CM 2027 diagnosis code

A50.2Early congenital syphilis, unspecified

✓ Billable / specificCC — complication/comorbidity

A50.2 is a valid, billable ICD-10-CM code for early congenital syphilis, unspecified. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About A50.2

A50.2 is the ICD-10-CM diagnosis code for early congenital syphilis, unspecified. It belongs to category A50 (congenital syphilis), block A50-A64 (infections with a predominantly sexual mode of transmission) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within A50, choose A50.2 (Early congenital syphilis, unspecified) only when documentation doesn't support a more specific option: early congenital syphilis, symptomatic (A50.0), early congenital syphilis, latent (A50.1), late congenital syphilitic oculopathy (A50.3), late congenital neurosyphilis [juvenile neurosyphilis] (A50.4), other late congenital syphilis, symptomatic (A50.5), late congenital syphilis, latent (A50.6), late congenital syphilis, unspecified (A50.7) and unspecified (A50.9).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 867 (Other Infectious and Parasitic Diseases Diagnoses with MCC, relative weight 2.1859), DRG 868 (Other Infectious and Parasitic Diseases Diagnoses with CC, relative weight 1.0235) and DRG 869 (Other Infectious and Parasitic Diseases Diagnoses without CC/MCC, relative weight 0.6787), in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 090.2 (early congenital syphilis, unspecified).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Congenital syphilis NOS less than two years after birth.

Notes that apply from higher levels

Instructions written at a parent level also apply to A50.2.

Broader instructions also apply from A50-A64 Infections with a predominantly sexual mode of transmission and Chapter 1: Certain infectious and parasitic diseases.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to A50.2.

Codes whose notes reference A50.2

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 090.2Early congenital syphilis, unspecifiedexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about A50.2

Is A50.2 billable?

Yes. A50.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can A50.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict A50.2 as a principal diagnosis.

Is A50.2 a CC or MCC?

A50.2 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does A50.2 group to?

A50.2 is used in the MS-DRG v44.0 logic for MS-DRG 867 (Other Infectious and Parasitic Diseases Diagnoses with MCC), MS-DRG 868 (Other Infectious and Parasitic Diseases Diagnoses with CC) and MS-DRG 869 (Other Infectious and Parasitic Diseases Diagnoses without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for A50.2?

The CMS General Equivalence Mappings map A50.2 to ICD-9-CM 090.2.