U.S. ICD-10-CM reference · FY2026 · April
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A49Category · further specificity requiredArchived

Bacterial infection of unspecified site

HierarchyA30-A49 · A49

Code-level instructions

Excludes 1
  • bacterial agents as the cause of diseases classified elsewhere (B95-B96)
  • chlamydial infection NOS (A74.9)
  • meningococcal infection NOS (A39.9)
  • rickettsial infection NOS (A79.9)
  • spirochetal infection NOS (A69.9)

Inherited instructions

Chapters 1 · Certain infectious and parasitic diseases (A00-B99)

Includes

diseases generally recognized as communicable or transmissible

Excludes 1

certain localized infections - see body system-related chapters

Excludes 2
  • carrier or suspected carrier of infectious disease (Z22.-)
  • 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)
Use additional code

code to identify resistance to antimicrobial drugs (Z16.-)

More specific codes

A49.0Staphylococcal infection, unspecified siteCategory · further specificity requiredA49.1Streptococcal infection, unspecified siteBillable / specificA49.2Hemophilus influenzae infection, unspecified siteBillable / specificA49.3Mycoplasma infection, unspecified siteBillable / specificA49.8Other bacterial infections of unspecified siteBillable / specificA49.9Bacterial infection, unspecifiedBillable / specific
Code edition