DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

A92 Other mosquito-borne viral fevers

  • Header · not billable

A92 is not billable. The category heads 11 billable codes in FY2027, grouped under 8 subdivisions.

Index → code

  • Zika NOS → A92.5
  • Bwamba fever → A92.8
  • Disease, diseasedZika virus → A92.5
Billable codes
11
Subdivisions
8
CC / MCC codes
7 / 4
HCC V28 codes
0
New FY2027
0
Index entries
43

Codes in A92

  1. A92.0
    Chikungunya virus disease
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Chikungunya (hemorrhagic) fever
  2. A92.1
    O'nyong-nyong fever
    BillableCC
  3. A92.2
    Venezuelan equine fever
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Venezuelan equine encephalitis
    • Venezuelan equine encephalomyelitis virus disease
  4. A92.3
    West Nile virus infection
    Header
    Inclusion terms 1

    Inclusion terms

    • West Nile fever
  5. A92.30
    West Nile virus infection, unspecified
    BillableMCC
    Inclusion terms 3

    Inclusion terms

    • West Nile fever NOS
    • West Nile fever without complications
    • West Nile virus NOS
  6. A92.31
    West Nile virus infection with encephalitis
    BillableMCC
    Inclusion terms 2

    Inclusion terms

    • West Nile encephalitis
    • West Nile encephalomyelitis
  7. A92.32
    West Nile virus infection with other neurologic manifestation
    BillableMCC
    Use additional code 1

    Use additional code

    • code to specify the neurologic manifestation
  8. A92.39
    West Nile virus infection with other complications
    BillableMCC
    Use additional code 1

    Use additional code

    • code to specify the other conditions
  9. A92.4
    Rift Valley fever
    BillableCC
  10. A92.5
    Zika virus disease
    BillableCC
    Inclusion terms 3, Excludes1 1

    Inclusion terms

    • Zika virus fever
    • Zika virus infection
    • Zika NOS

    Excludes1

    • congenital Zika virus disease (P35.4) P35.4
  11. A92.8
    Other specified mosquito-borne viral fevers
    BillableCC
  12. A92.9
    Mosquito-borne viral 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

At A92

Excludes1

  • Ross River disease (B33.1) B33.1

Notes that also apply

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

Index entries

  • Zika NOS → A92.5
  • Bwamba fever → A92.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Chikungunya (viral) (hemorrhagic) → A92.0
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)O'nyong-nyong (viral) → A92.1
  • Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute)Venezuelan equine → A92.2
  • EncephalomyelitisVenezuelan equine → A92.2
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Venezuelan equine → A92.2
  • Virus, viralWest Nile (fever) → A92.30
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Rift Valley (viral) → A92.4
  • Disease, diseasedZika virus → A92.5
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Zika virus → A92.5
  • Infection, infected, infective (opportunistic)Zika virus → A92.5
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Barmah forest → A92.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Bunyamwera → A92.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Bwamba → A92.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Chandipura → A92.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Guama (viral) → A92.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Mayaro (viral) → A92.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Mucambo (viral) → A92.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Pixuna (viral) → A92.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Wesselsbron (viral) → A92.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)mosquito-borne (viral) → A92.9
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)hemorrhagic (arthropod-borne) NOSChikungunya → A92.0
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute)in (due to)O'nyong-nyong → A92.1
  • Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute)equine (acute) (infectious) (viral)Venezuelan → A92.2
  • EncephalomyelitisequineVenezuelan → A92.2
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)WestNile (viral) → A92.30
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)hemorrhagic (arthropod-borne) NOSmosquito-borne → A92.8
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)mosquito-borne (viral)hemorrhagic → A92.8
  • Virus, viralWest Nile (fever)withencephalitis → A92.31
  • Virus, viralWest Nile (fever)withencephalomyelitis → A92.31
  • Virus, viralWest Nile (fever)withcranial nerve disorders → A92.32
  • Virus, viralWest Nile (fever)withneurologic manifestation NEC → A92.32
  • Virus, viralWest Nile (fever)withoptic neuritis → A92.32
  • Virus, viralWest Nile (fever)withpolyradiculitis → A92.32
  • Virus, viralWest Nile (fever)withcomplications NEC → A92.39
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)WestNile (viral)withencephalitis → A92.31
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)WestNile (viral)withencephalomyelitis → A92.31
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)WestNile (viral)withcranial nerve disorders → A92.32
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)WestNile (viral)withneurologic manifestation NEC → A92.32

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

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