A49
⚠ Non-billable
Bacterial infection of unspecified site
ICD-10-CM · FY2026 · Certain Infectious and Parasitic Diseases
Code
A49
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Certain Infectious and Parasitic Diseases
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes1 — never code together
- bacterial agents as the cause of diseases classified elsewhere (B95-B96)
- meningococcal infection NOS (A39.9)
- rickettsial infection NOS (A79.9)
- spirochetal infection NOS (A69.9)
Excludes2 — not included here, but may code together
- chlamydial infection NOS (A74.9)
Frequently asked questions
What is ICD-10 code A49?
ICD-10-CM code A49 represents Bacterial infection of unspecified site. It is a non-billable header code requiring a more specific subcategory in the Certain Infectious and Parasitic Diseases chapter, effective October 1, 2025 – September 30, 2026.
Is A49 billable?
No. A49 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is A49 in?
A49 belongs to the Certain Infectious and Parasitic Diseases chapter (A00–B99) of ICD-10-CM.
Related codes in the A49 category
A49.0
Staphylococcal infection, unspecified site
Non-billable
A49.1
Streptococcal infection, unspecified site
Billable
A49.2
Hemophilus influenzae infection, unspecified site
Billable
A49.3
Mycoplasma infection, unspecified site
Billable
A49.8
Other bacterial infections of unspecified site
Billable
A49.9
Bacterial infection, unspecified
Billable
A49.01
Methicillin susceptible Staphylococcus aureus infection, unspecified site
Billable
A49.02
Methicillin resistant Staphylococcus aureus infection, unspecified site
Billable
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