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ICD-10-CM 2027 diagnosis code

A52.2Asymptomatic neurosyphilis

✓ Billable / specificCC — complication/comorbidity

A52.2 is a valid, billable ICD-10-CM code for asymptomatic neurosyphilis. 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 A52.2

A52.2 is the ICD-10-CM diagnosis code for Asymptomatic neurosyphilis. It belongs to category A52 (late 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 A52 (late syphilis), A52.2 is specifically for Asymptomatic neurosyphilis. Related codes cover cardiovascular and cerebrovascular syphilis (A52.0), symptomatic neurosyphilis (A52.1), neurosyphilis, unspecified (A52.3), other symptomatic late syphilis (A52.7), latent (A52.8) and unspecified (A52.9).

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 097 (Non-Bacterial Infection of Nervous System Except Viral Meningitis with MCC, relative weight 3.8226), DRG 098 (Non-Bacterial Infection of Nervous System Except Viral Meningitis with CC, relative weight 2.2706) and DRG 099 (Non-Bacterial Infection of Nervous System Except Viral Meningitis without CC/MCC, relative weight 1.5256), in MDC 01 (Diseases and Disorders of the Nervous System), 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 094.3 (Asymptomatic neurosyphilis).

Notes that apply from higher levels

Instructions written at a parent level also apply to A52.2.

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

3 entries

Terms in the official ICD-10-CM index that lead to A52.2.

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 →
  • 094.3Asymptomatic neurosyphilisexact

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 A52.2

Is A52.2 billable?

Yes. A52.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can A52.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict A52.2 as a principal diagnosis.

Is A52.2 a CC or MCC?

A52.2 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does A52.2 group to?

A52.2 is used in the MS-DRG v44.0 logic for MS-DRG 097 (Non-Bacterial Infection of Nervous System Except Viral Meningitis with MCC), MS-DRG 098 (Non-Bacterial Infection of Nervous System Except Viral Meningitis with CC) and MS-DRG 099 (Non-Bacterial Infection of Nervous System Except Viral Meningitis 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 A52.2?

The CMS General Equivalence Mappings map A52.2 to ICD-9-CM 094.3.