A43

Non-billable

Nocardiosis

A43 is the ICD-10-CM code for Nocardiosis. It is a non-billable category code — use a more specific child code such as A43.0 for billing.

Status
Header (non-billable)
Chapter
A00-B99
Subcodes
4
Edition
FY2026

A00-B99 Certain infectious and parasitic diseases

What this means — in plain language

MedlinePlus · NIH

What are bacteria? Bacteria are tiny organisms (living things) that have only one cell. Under a microscope, they look like balls, rods, or spirals. They can be found almost everywhere on Earth. There are lots of bacteria in and on your body. In fact, your body has about 10 times more bacteria cells than human cells. There are many different types of bacteria. Most types don't make you sick. Some types are helpful.…

Read more about Bacterial Infections 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 A43?
A43 is the ICD-10-CM code for "Nocardiosis". It falls under A00-B99 Certain infectious and parasitic diseases.
Is A43 a billable code?
No — A43 is a non-billable header code. Use a more specific child code (such as A43.0) for billing.
What are the subcodes of A43?
A43 has 4 more specific child codes, including A43.0, A43.1, A43.8.

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.