A50UpcomingCategory · further specificity required

Congenital syphilis

Chapters 1 · Inherited instructions

Use additional code

code to identify resistance to antimicrobial drugs (Z16.-)

A50-A64 · Inherited instructions

Excludes 1

nonspecific and nongonococcal urethritis (N34.1)
Reiter's disease (M02.3-)

Excludes 2 · 6

Chapters 1 · Certain infectious and parasitic diseases (A00-B99)

Excludes 2

carrier or suspected carrier of infectious disease (Z22.-)
certain localized infections - see body system-related chapters
infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
infectious and parasitic diseases specific to the perinatal period (P35-P39)
influenza and other acute respiratory infections (J00-J22)

A50-A64 · Infections with a predominantly sexual mode of transmission (A50-A64)

Excludes 2

human immunodeficiency virus [HIV] disease (B20)

More specific codes

A50.0Early congenital syphilis, symptomatic A50.1Early congenital syphilis, latent A50.2Early congenital syphilis, unspecified A50.3Late congenital syphilitic oculopathy A50.4Late congenital neurosyphilis [juvenile neurosyphilis]A50.5Other late congenital syphilis, symptomatic A50.6Late congenital syphilis, latent A50.7Late congenital syphilis, unspecified A50.9Congenital syphilis, unspecified

Claims & coverage

When ICD-10-CM is required

For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.

Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.

Official coding guidelines → · CMS ↗

First observed · 2015-10-01

Code history

Latest recorded change · FY2027

ChangedUnchanged

FY2027UpcomingSelected edition

Effective from 2026-10-01

Inherited rules changed

Congenital syphilis

Category — select a more specific code

CDC/NCHS · FY2027

All editions (19)

All editions	Effective from	Code history
FY2016	2015-10-01	First observed
FY2017	2016-10-01	No tabular change
FY2018	2017-10-01	No tabular change
FY2019	2018-10-01	No tabular change
FY2020	2019-10-01	No tabular change
FY2020 · April	2020-04-01	No tabular change
FY2021	2020-10-01	No tabular change
FY2021 · 01-01	2021-01-01	No tabular change
FY2022	2021-10-01	No tabular change
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	No tabular change
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	Inherited rules changed
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	No tabular change
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	Inherited rules changed

Code-level instructions

The official Tabular List has no additional instructions at this code level.

Review the instructions inherited from its parent categories below. Inherited instructions ↓

Review the official coding guidelines ↗

Inherited instructions

Chapters 1 · Certain infectious and parasitic diseases (A00-B99)

Includes

diseases generally recognized as communicable or transmissible

Excludes 2

carrier or suspected carrier of infectious disease (Z22.-)
certain localized infections - see body system-related chapters
infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
infectious and parasitic diseases specific to the perinatal period (P35-P39)
influenza and other acute respiratory infections (J00-J22)

Use additional code

code to identify resistance to antimicrobial drugs (Z16.-)

A50-A64 · Infections with a predominantly sexual mode of transmission (A50-A64)

Excludes 1

nonspecific and nongonococcal urethritis (N34.1)
Reiter's disease (M02.3-)

Excludes 2

human immunodeficiency virus [HIV] disease (B20)

More specific codes

A50.0Early congenital syphilis, symptomaticCategory · further specificity required A50.1Early congenital syphilis, latentBillable / specific A50.2Early congenital syphilis, unspecifiedBillable / specific A50.3Late congenital syphilitic oculopathyCategory · further specificity required A50.4Late congenital neurosyphilis [juvenile neurosyphilis]Category · further specificity required A50.5Other late congenital syphilis, symptomaticCategory · further specificity required A50.6Late congenital syphilis, latentBillable / specific A50.7Late congenital syphilis, unspecifiedBillable / specific A50.9Congenital syphilis, unspecifiedBillable / specific

Related codes

Official titles and instructions are preserved in their source language. Official sources ↗

References from other codes (6)

J99 · Respiratory disorders in diseases classified elsewhere

Code first · congenital syphilis (A50.-)

N34 · Urethritis and urethral syndrome

Excludes 2 · urethritis in diseases with a predominantly sexual mode of transmission (A50-A64)

O98.1 · Syphilis complicating pregnancy, childbirth and the puerperium

Inclusion terms · Conditions in A50-A53

P37 · Other congenital infectious and parasitic diseases

Excludes 2 · congenital syphilis (A50.-)

sections/A65-A69 · Other spirochetal diseases (A65-A69)

Excludes 2 · syphilis (A50-A53)

sections/P35-P39 · Infections specific to the perinatal period (P35-P39)

Excludes 2 · congenital syphilis (A50.-)