DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

A25 Rat-bite fevers

  • Header · not billable

A25 is not billable. The category heads 3 billable codes in FY2027: the 3 codes directly below it.

Index → code

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. A20-A28 Certain zoonotic bacterial diseases (A20-A28)
  3. A25 Rat-bite fevers
Billable codes
3
Subdivisions
3
CC / MCC codes
3 / 0
HCC V28 codes
0
New FY2027
0
Index entries
25

Codes in A25

  1. A25.0
    Spirillosis
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Sodoku
  2. A25.1
    Streptobacillosis
    BillableCC
    Inclusion terms 3

    Inclusion terms

    • Epidemic arthritic erythema
    • Haverhill fever
    • Streptobacillary rat-bite fever
  3. A25.9
    Rat-bite fever, unspecified
    BillableCC

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

Notes that also apply

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

Index entries

  • Sodoku → A25.0
  • Spirillosis → A25.0
  • Haverhill fever → A25.1
  • Streptobacillary fever → A25.1
  • Streptobacillosis → A25.1
  • Streptobacillus moniliformis → A25.1
  • Rat-bite fever → A25.9
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)spirillary → A25.0
  • Infection, infected, infective (opportunistic)Spirillum → A25.0
  • Rat-bite feverspirochetal (morsus muris) → A25.0
  • Spirillumminus → A25.0
  • Actinobacillosis, actinobacillusmuris → A25.1
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute)epidemic erythema → A25.1
  • Erythema, erythematous (infectional) (inflammation)arthriticum epidemicum → A25.1
  • Erythema, erythematous (infectional) (inflammation)epidemic, arthritic → A25.1
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Haverhill → A25.1
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)streptobacillary → A25.1
  • Infection, infected, infective (opportunistic)streptobacillus moniliformis → A25.1
  • Rat-bite feverdue to Streptobacillus moniliformis → A25.1
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)rat-bite → A25.9
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute)due to or associated withrat bite fever → A25.1
  • Infection, infected, infective (opportunistic)Actinobacillus (actinomycetem-comitans)muris → A25.1
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)rat-bitedue toSpirillum → A25.0
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute)due to or associated witherythemaepidemic → A25.1
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)rat-bitedue toStreptobacillus moniliformis → A25.1

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