All ICD10 Codes

A49

Non-Billable
ChapterA00–B99
Rankcategory
Official Description

Bacterial infection of unspecified site

Use a more specific code (5 billable, 1 non-billable)
A49.0Staphylococcal infection, unspecified sitehas subcodesA49.1Streptococcal infection, unspecified siteA49.2Hemophilus influenzae infection, unspecified siteA49.3Mycoplasma infection, unspecified siteA49.8Other bacterial infections of unspecified siteA49.9Bacterial infection, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

CH1 Parent Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here. Use a different code.)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here. Code separately if applicable.)
  • 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.-)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • 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)

Clinical Hierarchy

BillableHas subcodes
CH1Certain infectious and parasitic diseases (A00-B99)
A30-A49Other bacterial diseases (A30-A49)
A49Bacterial infection of unspecified siteNot billable
A49.0Staphylococcal infection, unspecified siteSubcodes
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

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to A49:

chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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