A50.40 Late congenital neurosyphilis, unspecified
The ICD-10-CM code for Late congenital neurosyphilis, unspecified is A50.40 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- A50-A64: Infections with a predominantly sexual mode of transmission (A50-A64)
- Category A50
- 38 codes (33 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to A50.40:
- Neurosyphilis (arrested) (early) (gumma) (late) (latent) (recurrent) (relapse) › juvenile (asymptomatic) (meningeal)
- Neurosyphilis (arrested) (early) (gumma) (late) (latent) (recurrent) (relapse) › congenital
- Syphilis, syphilitic (acquired) › central nervous system (late) (recurrent) (relapse) (tertiary) › congenital
- Syphilis, syphilitic (acquired) › central nervous system (late) (recurrent) (relapse) (tertiary) › juvenile
Inclusion Terms
- Juvenile neurosyphilis NOS
U.S. Hospital Utilization
- An estimated 55 U.S. inpatient stays in 2017 included A50.40 among the documented diagnoses.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
HIV Infections (TOC entry)a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19
Infectious agents causing diseases in other chapters (TOC)b. Infectious agents as the cause of diseases classified to other chapters ................................. 22
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026