DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

A75 Typhus fever

  • Header · not billable

A75 is not billable. The category heads 5 billable codes in FY2027: the 5 codes directly below it.

Index → code

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. A75-A79 Rickettsioses (A75-A79)
  3. A75 Typhus fever
Billable codes
5
Subdivisions
5
CC / MCC codes
5 / 0
HCC V28 codes
0
New FY2027
0
Index entries
64

Codes in A75

  1. A75.0
    Epidemic louse-borne typhus fever due to Rickettsia prowazekii
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Classical typhus (fever)
    • Epidemic (louse-borne) typhus
  2. A75.1
    Recrudescent typhus [Brill's disease]
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Brill-Zinsser disease
  3. A75.2
    Typhus fever due to Rickettsia typhi
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Murine (flea-borne) typhus
  4. A75.3
    Typhus fever due to Rickettsia tsutsugamushi
    BillableCC
    Inclusion terms 3

    Inclusion terms

    • Scrub (mite-borne) typhus
    • Tsutsugamushi fever
    • Typhus fever due to Orientia Tsutsugamushi (scrub typhus)
  5. A75.9
    Typhus fever, unspecified
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Typhus (fever) NOS

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

At A75

Excludes1

  • rickettsiosis due to Ehrlichia sennetsu (A79.81) A79.81

Notes that also apply

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

Index entries

  • Hildenbrand's disease → A75.0
  • Brill (-Zinsser) disease (recrudescent typhus) → A75.1
  • Recrudescent typhus (fever) → A75.1
  • Maxcy's disease → A75.2
  • Mooser-Neill reaction → A75.2
  • Mooser's bodies → A75.2
  • Kedani fever → A75.3
  • Sumatran mite fever → A75.3
  • Tsutsugamushi (disease) (fever) → A75.3
  • Canton fever → A75.9
  • Petechial typhus → A75.9
  • Tabardillo → A75.9
  • Typhus (fever) → A75.9
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)famine → A75.0
  • Tabardillolouse-borne → A75.0
  • Typhus (fever)classical → A75.0
  • Typhus (fever)epidemic (louse-borne) → A75.0
  • Typhus (fever)exanthematic NEC → A75.0
  • Typhus (fever)exanthematicus SAI → A75.0
  • Typhus (fever)louse-borne → A75.0
  • Disease, diseasedBrill's (recrudescent typhus) → A75.1
  • Disease, diseasedBrill-Zinsser (recrudescent typhus) → A75.1
  • Typhus (fever)recrudescent → A75.1
  • Body, bodiesMooser's → A75.2
  • Disease, diseasedMaxcy's → A75.2
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Mexican → A75.2
  • Tabardilloflea-borne → A75.2
  • Typhus (fever)endemic (flea-borne) → A75.2
  • Typhus (fever)flea-borne → A75.2
  • Typhus (fever)Mexican → A75.2
  • Typhus (fever)murine → A75.2
  • Typhus (fever)rat → A75.2
  • Typhus (fever)shop (of Malaysia) → A75.2
  • Disease, diseasedakamushi (scrub typhus) → A75.3
  • Disease, diseasedisland (scrub typhus) → A75.3
  • Disease, diseasedKedani (scrub typhus) → A75.3
  • Disease, diseasedshimamushi (scrub typhus) → A75.3
  • Disease, diseasedtsutsugamushi → A75.3
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Japanese river → A75.3
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)kedani → A75.3

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

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