A50.4 — Late congenital neurosyphilis [juvenile neurosyphilis]
A50.4 is a non-billable header ICD-10-CM code for late congenital neurosyphilis [juvenile neurosyphilis]. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- Hutchinson's triad (A50.53)
Use additional code
Add a secondary code to capture the detail described below.
- code to identify any associated mental disorder
Other codes that can never be billed with A50.4
These codes carry an Excludes1 note pointing at A50.4. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A50.4 alone.
- G94Other disorders of brain in diseases classified elsewhere
Risk adjustment
A50.4 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead A50.4
7 child codes. Green means billable.
- A50.40Late congenital neurosyphilis, unspecified
- A50.41Late congenital syphilitic meningitis
- A50.42Late congenital syphilitic encephalitis
- A50.43Late congenital syphilitic polyneuropathy
- A50.44Late congenital syphilitic optic nerve atrophy
- A50.45Juvenile general paresis
- A50.49Other late congenital neurosyphilis
Related codes at this level
Codes that share A50. If A50.4 is not quite right, the correct code is usually one of these.
- A50.0Early congenital syphilis, symptomatic
- A50.1Early congenital syphilis, latent
- A50.2Early congenital syphilis, unspecified
- A50.3Late congenital syphilitic oculopathy
- A50.5Other late congenital syphilis, symptomatic
- A50.6Late congenital syphilis, latent
- A50.7Late congenital syphilis, unspecified
- A50.9Congenital syphilis, unspecified
Questions about A50.4
- Is A50.4 a billable ICD-10-CM code?
- No. A50.4 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does A50.4 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Infections with a predominantly sexual mode of transmission (A50-A64).
- What cannot be coded together with A50.4?
- A50.4 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.