What does ICD-10 code A50.6 mean?

ICD-10 code A50.6 is the standardized code used for late congenital syphilis, latent in medical records and coding systems.

When is ICD-10 code A50.6 used?

Doctors, hospitals, and insurers may use ICD-10 code A50.6 when recording late congenital syphilis, latent in a standardized format.

Does ICD-10 code A50.6 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10BillableValid for clinical use

ICD-10 Code A50.6: Late congenital syphilis, latent

Name: ICD-10 Code A50.6: Late congenital syphilis, latent
Creator: HealthAssure Clinical Team
Published: 2026-05-26T05:25:39.445Z

A50.6 is a billable ICD-10 diagnosis code used to classify Late congenital syphilis, latent in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. 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 syphilis, latent in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

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.

Code hierarchy

chapter

1Certain infectious and parasitic diseases (A00-B99)

block

A50-A64Infections with a predominantly sexual mode of transmission

Official coding notes

Inclusion terms

Congenital syphilis without clinical manifestations, with positive serological reaction and negative spinal fluid test, two years or more after birth.

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Infectious Disease SpecialistGeneral Physician

Sibling codes

A50.0Early congenital syphilis, symptomatic A50.1Early congenital syphilis, latentbillable A50.2Early congenital syphilis, unspecifiedbillable A50.3Late congenital syphilitic oculopathy A50.4Late congenital neurosyphilis [juvenile neurosyphilis]A50.5Other late congenital syphilis, symptomatic A50.7Late congenital syphilis, unspecifiedbillable A50.9Congenital syphilis, unspecifiedbillable

Mapped diagnoses and classifications

SNOMED_CT 827006high

Late congenital syphilis, latent (+ sero., - C.S.F., 2 years OR more)

Source: SNOMED International ICD-10 map

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.

Legacy codes

A50.6

Common synonyms

Late congenital syphilis, latent

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.