ICD-10-CM 2027 diagnosis code
A50Congenital syphilis
A50 is a header code, so it can't be reported by itself. Choose one of the 9 more specific codes beneath it.
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 A50
A50 is the ICD-10-CM diagnosis code for congenital syphilis. It belongs to block A50-A64 (infections with a predominantly sexual mode of transmission) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: A50.0 (symptomatic), A50.1 (latent), A50.2 (unspecified), A50.3 (oculopathy), A50.4 (neurosyphilis]), A50.5 (symptomatic), A50.6 (latent), A50.7 (unspecified) and 1 more.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under A50
- A50.0Early congenital syphilis, symptomatic
- A50.01Early congenital syphilitic oculopathyBillable
- A50.02Early congenital syphilitic osteochondropathyBillable
- A50.03Early congenital syphilitic pharyngitisBillable
- A50.04Early congenital syphilitic pneumoniaBillable
- A50.05Early congenital syphilitic rhinitisBillable
- A50.06Early cutaneous congenital syphilisBillable
- A50.07Early mucocutaneous congenital syphilisBillable
- A50.08Early visceral congenital syphilisBillable
- A50.09Other early congenital syphilis, symptomaticBillable
- A50.1Early congenital syphilis, latentBillable
- A50.2Early congenital syphilis, unspecifiedBillable
- A50.3Late congenital syphilitic oculopathy
- A50.4Late congenital neurosyphilis [juvenile neurosyphilis]
- A50.40Late congenital neurosyphilis, unspecifiedBillable
- A50.41Late congenital syphilitic meningitisBillable
- A50.42Late congenital syphilitic encephalitisBillable
- A50.43Late congenital syphilitic polyneuropathyBillable
- A50.44Late congenital syphilitic optic nerve atrophyBillable
- A50.45Juvenile general paresisBillable
- A50.49Other late congenital neurosyphilisBillable
- A50.5Other late congenital syphilis, symptomatic
- A50.51Clutton's jointsBillable
- A50.52Hutchinson's teethBillable
- A50.53Hutchinson's triadBillable
- A50.54Late congenital cardiovascular syphilisBillable
- A50.55Late congenital syphilitic arthropathyBillable
- A50.56Late congenital syphilitic osteochondropathyBillable
- A50.57Syphilitic saddle noseBillable
- A50.59Other late congenital syphilis, symptomaticBillable
- A50.6Late congenital syphilis, latentBillable
- A50.7Late congenital syphilis, unspecifiedBillable
- A50.9Congenital syphilis, unspecifiedBillable
Notes that apply from higher levels
Instructions written at a parent level also apply to A50.
Broader instructions also apply from A50-A64 Infections with a predominantly sexual mode of transmission and Chapter 1: Certain infectious and parasitic diseases.
Codes whose notes reference A50
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about A50
Is A50 billable?
- No. A50 is a header code. Report one of its more specific subcodes instead.