DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

A49 Bacterial infection of unspecified site

  • Header · not billable

A49 is not billable. The category heads 7 billable codes in FY2027, grouped under 6 subdivisions.

Index → code

  • Colibacillosis → A49.8
  • Friedländer's B (bacillus) NEC → A49.8
  • Burkholderiacepacia → A49.8

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. A30-A49 Other bacterial diseases (A30-A49)
  3. A49 Bacterial infection of unspecified site
Billable codes
7
Subdivisions
6
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
29

Codes in A49

  1. A49.0
    Staphylococcal infection, unspecified site
    Header
  2. A49.01
    Methicillin susceptible Staphylococcus aureus infection, unspecified site
    Billable
    Inclusion terms 2

    Inclusion terms

    • Methicillin susceptible Staphylococcus aureus (MSSA) infection
    • Staphylococcus aureus infection NOS
  3. A49.02
    Methicillin resistant Staphylococcus aureus infection, unspecified site
    Billable
    Inclusion terms 1

    Inclusion terms

    • Methicillin resistant Staphylococcus aureus (MRSA) infection
  4. A49.1
    Streptococcal infection, unspecified site
    Billable
  5. A49.2
    Hemophilus influenzae infection, unspecified site
    Billable
  6. A49.3
    Mycoplasma infection, unspecified site
    Billable
  7. A49.8
    Other bacterial infections of unspecified site
    Billable
  8. A49.9
    Bacterial infection, unspecified
    Billable
    Excludes1 1

    Excludes1

    • bacteremia NOS (R78.81) R78.81

Sources of each column.

Instructions

At A49

Excludes1

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

Excludes2

  • chlamydial infection NOS (A74.9) A74.9

Notes that also apply

Chapter 1 instructions (Includes 1, Excludes2 5, Use additional code 1): printed on the chapter 1 page.

Index entries

  • Colibacillosis → A49.8
  • Friedländer's B (bacillus) NEC → A49.8
  • MSSA (Methicillin susceptible Staphylococcus aureus)infection → A49.01
  • MRSA (Methicillin resistant Staphylococcus aureus)infection → A49.02
  • Infection, infected, infective (opportunistic)pneumococcus, pneumococcal NEC → A49.1
  • Infection, infected, infective (opportunistic)streptococcal NEC → A49.1
  • Infection, infected, infective (opportunistic)Mycoplasma NEC → A49.3
  • Infection, infected, infective (opportunistic)pleuro-pneumonia-like organism (PPLO) NEC → A49.3
  • Burkholderiacepacia → A49.8
  • Infection, infected, infective (opportunistic)Bacteroides NEC → A49.8
  • Infection, infected, infective (opportunistic)Cronobacter (sakazakii) → A49.8
  • Infection, infected, infective (opportunistic)Escherichia (E.) coli NEC → A49.8
  • Infection, infected, infective (opportunistic)Klebsiella (K.) pneumoniae NEC → A49.8
  • Infection, infected, infective (opportunistic)mixed flora (bacterial) NEC → A49.8
  • Infection, infected, infective (opportunistic)Proteus (mirabilis) (morganii) (vulgaris) NEC → A49.8
  • Infection, infected, infective (opportunistic)Pseudomonas NEC → A49.8
  • Infection, infected, infective (opportunistic)Serratia NEC → A49.8
  • Disease, diseasedbacterial → A49.9
  • Infection, infected, infective (opportunistic)Bacillus → A49.9
  • Infection, infected, infective (opportunistic)bacterial NOS → A49.9
  • Infection, infected, infective (opportunistic)gram-negative bacilli NOS → A49.9
  • Infection, infected, infective (opportunistic)methicillinsusceptible Staphylococcus aureus (MSSA) → A49.01
  • Infection, infected, infective (opportunistic)staphylococcal, unspecified siteaureus (methicillin susceptible) (MSSA) → A49.01
  • Infection, infected, infective (opportunistic)methicillinresistant Staphylococcus aureus (MRSA) → A49.02
  • Infection, infected, infective (opportunistic)Hemophilusinfluenzae NEC → A49.2
  • Infection, infected, infective (opportunistic)BacillusFriedländer's NEC → A49.8
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute)in (due to)bacterial disease → A49.9
  • Infection, infected, infective (opportunistic)staphylococcal, unspecified siteaureus (methicillin susceptible) (MSSA)methicillin resistant (MRSA) → A49.02
  • Infection, infected, infective (opportunistic)bacterial NOSas cause of disease classified elsewhereCronobacter (sakazakii) → A49.8

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy