2020 ICD-10-CM Diagnosis Code A79.0

Trench fever

    2016 2017 2018 2019 2020 Billable/Specific Code
  • A79.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM A79.0 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of A79.0 - other international versions of ICD-10 A79.0 may differ.
Applicable To
  • Quintan fever
  • Wolhynian fever
The following code(s) above A79.0 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to A79.0:
  • A00-B99
    2020 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
Clinical Information
  • An intermittent fever characterized by intervals of chills, fever, and splenomegaly each of which may last as long as 40 hours. It is caused by bartonella quintana and transmitted by the human louse.
ICD-10-CM A79.0 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 867 Other infectious and parasitic diseases diagnoses with mcc
  • 868 Other infectious and parasitic diseases diagnoses with cc
  • 869 Other infectious and parasitic diseases diagnoses without cc/mcc

Convert A79.0 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to A79.0:
  • Disease, diseased - see also Syndrome
    • His A79.0 (-Werner) (trench fever)
    • Werner-His A79.0 (trench fever)
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) R50.9
    ICD-10-CM Diagnosis Code R50.9

    Fever, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Fever NOS
    • Fever of unknown origin [FUO]
    • Fever with chills
    • Fever with rigors
    • Hyperpyrexia NOS
    • Persistent fever
    • Pyrexia NOS
    • five day A79.0
    • Meuse A79.0
    • quintan A79.0
    • shin-bone A79.0
    • trench A79.0
    • Volhynian A79.0
    • Wolhynian A79.0
  • His-Werner disease A79.0
  • Infection, infected, infective (opportunistic) B99.9
    ICD-10-CM Diagnosis Code B99.9

    Unspecified infectious disease

      2016 2017 2018 2019 2020 Billable/Specific Code
    • trench fever A79.0
  • Quintan fever A79.0
  • Trench
    • fever A79.0
  • Volhynian fever A79.0
  • Werner-His disease A79.0
  • Wolhynian fever A79.0

ICD-10-CM Codes Adjacent To A79.0
A77.2 Spotted fever due to Rickettsia siberica
A77.3 Spotted fever due to Rickettsia australis
A77.4 Ehrlichiosis
A77.40 …… unspecified
A77.41 …… chafeensis [E. chafeensis]
A77.49 Other ehrlichiosis
A77.8 Other spotted fevers
A77.9 Spotted fever, unspecified
A78 Q fever
A79 Other rickettsioses
A79.0 Trench fever
A79.1 Rickettsialpox due to Rickettsia akari
A79.8 Other specified rickettsioses
A79.81 Rickettsiosis due to Ehrlichia sennetsu
A79.89 Other specified rickettsioses
A79.9 Rickettsiosis, unspecified
A80 Acute poliomyelitis
A80.0 Acute paralytic poliomyelitis, vaccine-associated
A80.1 Acute paralytic poliomyelitis, wild virus, imported
A80.2 Acute paralytic poliomyelitis, wild virus, indigenous
A80.3 Acute paralytic poliomyelitis, other and unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.