DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

A27 Leptospirosis

  • Header · not billable

A27 is not billable. The category heads 4 billable codes in FY2027, grouped under 3 subdivisions.

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. A27 Leptospirosis
Billable codes
4
Subdivisions
3
CC / MCC codes
3 / 1
HCC V28 codes
0
New FY2027
0
Index entries
48

Codes in A27

  1. A27.0
    Leptospirosis icterohemorrhagica
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Leptospiral or spirochetal jaundice (hemorrhagic)
    • Weil's disease
  2. A27.8
    Other forms of leptospirosis
    Header
  3. A27.81
    Aseptic meningitis in leptospirosis
    BillableMCC
  4. A27.89
    Other forms of leptospirosis
    BillableCC
  5. A27.9
    Leptospirosis, 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

  • Landouzy's disease (icterohemorrhagic leptospirosis) → A27.0
  • Matheiu's disease (leptospiral jaundice) → A27.0
  • Wassilieff's disease → A27.0
  • Weil's disease → A27.0
  • Fort Bragg fever → A27.89
  • Nanukayami → A27.89
  • Leptospirosis → A27.9
  • Disease, diseasedFiedler's (leptospiral jaundice) → A27.0
  • Disease, diseasedLancereaux-Mathieu (leptospiral jaundice) → A27.0
  • Disease, diseasedLarrey-Weil (leptospiral jaundice) → A27.0
  • Disease, diseasedMathieu's (leptospiral jaundice) → A27.0
  • Disease, diseasedWassilieff's (leptospiral jaundice) → A27.0
  • Disease, diseasedWeil's (leptospiral jaundice of lung) → A27.0
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)icterohemorrhagic → A27.0
  • Fiedler'sdisease (icterohemorrhagic leptospirosis) → A27.0
  • Icterushemorrhagic (acute) (leptospiral) (spirochetal) → A27.0
  • Icterusspirochetal → A27.0
  • Jaundice (yellow)hemorrhagic (acute) (leptospiral) (spirochetal) → A27.0
  • Jaundice (yellow)leptospiral (hemorrhagic) → A27.0
  • Jaundice (yellow)spirochetal (hemorrhagic) → A27.0
  • Leptospirosisdue to Leptospira interrogans serovar icterohaemorrhagiae → A27.0
  • Leptospirosisicterohemorrhagica → A27.0
  • LeptospirosisWeil's disease → A27.0
  • Spirochetosisicterohemorrhagic → A27.0
  • Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)leptospiral (aseptic) → A27.81
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Fort Bragg → A27.89
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)pretibial → A27.89
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)seven day (leptospirosis) (autumnal) (Japanese) → A27.89
  • Leptospirosiscanicola → A27.89
  • Leptospirosispomona → A27.89
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)mud → A27.9
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)swamp → A27.9
  • Infection, infected, infective (opportunistic)Leptospira interrogans → A27.9
  • Icterusinfectiousleptospiral → A27.0
  • Icterusinfectiousspirochetal → A27.0
  • Infection, infected, infective (opportunistic)Leptospira interrogansicterohaemorrhagiae → A27.0
  • Jaundice (yellow)epidemic (catarrhal)leptospiral → A27.0
  • Jaundice (yellow)epidemic (catarrhal)spirochetal → A27.0
  • Jaundice (yellow)febrile (acute)leptospiral → A27.0
  • Jaundice (yellow)febrile (acute)spirochetal → A27.0

8 more, longer entries are not listed; the search box finds them by word.

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