A49.9
BillableBacterial infection, unspecified
A49.9 is the ICD-10-CM code for Bacterial infection, unspecified. It is a billable, specific code valid for reimbursement.
A00-B99 Certain infectious and parasitic diseases
What this means — in plain language
MedlinePlus · NIHWhat 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.
Excludes1 — not coded here
- •bacteremia NOS (R78.81)
Frequently asked questions
- What is ICD-10 code A49.9?
- A49.9 is the ICD-10-CM code for "Bacterial infection, unspecified". It falls under A00-B99 Certain infectious and parasitic diseases.
- Is A49.9 a billable code?
- Yes — A49.9 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from A49.9?
- Excludes1 (not coded here): bacteremia NOS (R78.81).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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