ICD10
ICD-10 Code A50.4: Late congenital neurosyphilis [juvenile neurosyphilis]
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).
When is it used?
- May be used when a clinician documents late congenital neurosyphilis [juvenile neurosyphilis] in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
1Certain infectious and parasitic diseases (A00-B99)
block
A50-A64Infections with a predominantly sexual mode of transmission
category
A50Congenital syphilis
currentA50
Official coding notes
Applicable to
- code to identify any associated mental disorder
Excludes1 (do not code together)
- Hutchinson's triad (A50.53)
Use additional code
- code to identify any associated mental disorder
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
Infectious Disease SpecialistGeneral Physician
Related codes
A50.40Late congenital neurosyphilis, unspecifiedcodeA50.41Late congenital syphilitic meningitiscodeA50.42Late congenital syphilitic encephalitiscodeA50.43Late congenital syphilitic polyneuropathycodeA50.44Late congenital syphilitic optic nerve atrophycodeA50.45Juvenile general paresiscodeA50.49Other late congenital neurosyphiliscode
Sibling codes
A50.0Early congenital syphilis, symptomaticA50.1Early congenital syphilis, latentbillableA50.2Early congenital syphilis, unspecifiedbillableA50.3Late congenital syphilitic oculopathyA50.5Other late congenital syphilis, symptomaticA50.6Late congenital syphilis, latentbillableA50.7Late congenital syphilis, unspecifiedbillableA50.9Congenital syphilis, unspecifiedbillable
Mapped diagnoses and classifications
SNOMED_CT 32735002high
Congenital syphilitic encephalitis
Source: SNOMED International ICD-10 map
SNOMED_CT 6267005high
Congenital syphilitic meningitis
Source: SNOMED International ICD-10 map
SNOMED_CT 82959004high
Dementia paralytica juvenilis
Source: SNOMED International ICD-10 map
SNOMED_CT 240552005high
Juvenile tabes dorsalis
Source: SNOMED International ICD-10 map
SNOMED_CT 68764005high
Juvenile taboparesis
Source: SNOMED International ICD-10 map
SNOMED_CT 266126006high
Late congenital neurosyphilis
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
A50.4
Replacement codes
A50.40 — Late congenital neurosyphilis, unspecifiedA50.41 — Late congenital syphilitic meningitisA50.42 — Late congenital syphilitic encephalitisA50.43 — Late congenital syphilitic polyneuropathyA50.44 — Late congenital syphilitic optic nerve atrophyA50.45 — Juvenile general paresisA50.49 — Other late congenital neurosyphilis
Common synonyms
Late congenital neurosyphilis [juvenile neurosyphilis]
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.