A49
Bacterial infection of unspecified site
A49 is a non-billable ICD-10-CM code category for bacterial infection of unspecified site. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are A49.0 Staphylococcal infection, unspecified site; A49.1 Streptococcal infection, unspecified site; A49.2 Hemophilus influenzae infection, unspecified site; A49.3 Mycoplasma infection, unspecified site and 2 more. Its coding notes include a Use additional code instruction, 4 Excludes1 entries and 6 Excludes2 entries.
Use additional code
Add the listed code as a secondary code, if known.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
- chlamydial infection NOS (A74.9)
Also from chapter/block level (5 notes)
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Includes
Further defines or gives examples of the content of the category.
Also from chapter/block level (1 note)
- diseases generally recognized as communicable or transmissible
More specific codes under A49 6
- A49.0Staphylococcal infection, unspecified siteHeader
- A49.1Streptococcal infection, unspecified siteBillable
- A49.2Hemophilus influenzae infection, unspecified siteBillable
- A49.3Mycoplasma infection, unspecified siteBillable
- A49.8Other bacterial infections of unspecified siteBillable
- A49.9Bacterial infection, unspecifiedBillable