A50.42

Billable

Late congenital syphilitic encephalitis

A50.42 is the ICD-10-CM code for Late congenital syphilitic encephalitis. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
A00-B99
Parent
A50.4
Edition
FY2026

A00-B99 Certain infectious and parasitic diseases

What this means — in plain language

MedlinePlus · NIH

What is encephalitis? Encephalitis is inflammation (swelling) of the brain. It can happen when an infection or medical condition that affects the brain activates your immune system. The inflammation can cause a wide range of symptoms. In extreme cases, it can lead to brain damage, stroke , or even death. What causes encephalitis? There are different types of encephalitis, based on what the cause is. The two main…

Read more about Encephalitis at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code A50.42?
A50.42 is the ICD-10-CM code for "Late congenital syphilitic encephalitis". It falls under A00-B99 Certain infectious and parasitic diseases.
Is A50.42 a billable code?
Yes — A50.42 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

Look up another ICD-10 code or condition

Powered by Eleplan

Free ICD-10 lookup is just the start. Eleplan keeps the whole care plan in one place.

Diagnoses, medications, documents, appointments, and the whole care team — organized and always in sync, with Ellie, your AI care assistant, on top of it. Free to start.