2022 ICD-10-CM Diagnosis Code A78

Q fever

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
  • A78 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2022 edition of ICD-10-CM A78 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of A78 - other international versions of ICD-10 A78 may differ.
Applicable To
  • Infection due to Coxiella burnetii
  • Nine Mile fever
  • Quadrilateral fever
The following code(s) above A78 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 A78:
  • A00-B99
    2022 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
  • A bacterial infection caused by coxiella burnetii. It is transmitted to humans by the inhalation of infected air particles or contact with fluids and feces of infected animals. Signs and symptoms include the abrupt onset of fever, headache, myalgias, and weakness.
  • Acute infectious disease caused by coxiella burnetii; characterized by a sudden onset of fever,headache, malaise, and weakness; in humans, it is commonly contracted by inhalation of infected dusts derived from infected domestic animals.
  • An acute infectious disease caused by coxiella burnetii. It is characterized by a sudden onset of fever; headache; malaise; and weakness. In humans, it is commonly contracted by inhalation of infected dusts derived from infected domestic animals (animals, domestic).
ICD-10-CM A78 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
  • 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 A78 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
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
Code annotations containing back-references to A78:
  • Code First: J17
    , I39
    ICD-10-CM Diagnosis Code J17

    Pneumonia in diseases classified elsewhere

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Manifestation Code
    Code First
    • underlying disease, such as:
    • Q fever (A78)
    • rheumatic fever (I00)
    • schistosomiasis (B65.0-B65.9)
    Type 1 Excludes
    • candidial pneumonia (B37.1)
    • chlamydial pneumonia (J16.0)
    • gonorrheal pneumonia (A54.84)
    • histoplasmosis pneumonia (B39.0-B39.2)
    • measles pneumonia (B05.2)
    • nocardiosis pneumonia (A43.0)
    • pneumocystosis (B59)
    • pneumonia due to Pneumocystis carinii (B59)
    • pneumonia due to Pneumocystis jiroveci (B59)
    • pneumonia in actinomycosis (A42.0)
    • pneumonia in anthrax (A22.1)
    • pneumonia in ascariasis (B77.81)
    • pneumonia in aspergillosis (B44.0-B44.1)
    • pneumonia in coccidioidomycosis (B38.0-B38.2)
    • pneumonia in cytomegalovirus disease (B25.0)
    • pneumonia in toxoplasmosis (B58.3)
    • rubella pneumonia (B06.81)
    • salmonella pneumonia (A02.22)
    • spirochetal infection NEC with pneumonia (A69.8)
    • tularemia pneumonia (A21.2)
    • typhoid fever with pneumonia (A01.03)
    • varicella pneumonia (B01.2)
    • whooping cough with pneumonia (A37 with fifth-character 1)
    ICD-10-CM Diagnosis Code I39

    Endocarditis and heart valve disorders in diseases classified elsewhere

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Manifestation Code
    Code First
    • underlying disease, such as:
    • Q fever (A78)
    Type 1 Excludes

Diagnosis Index entries containing back-references to A78:
  • Australian
    • Q fever A78
  • Balkan grippe A78
  • Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) I38
    ICD-10-CM Diagnosis Code I38

    Endocarditis, valve unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Includes
    • endocarditis (chronic) NOS
    • valvular incompetence NOS
    • valvular insufficiency NOS
    • valvular regurgitation NOS
    • valvular stenosis NOS
    • valvulitis (chronic) NOS
    Type 1 Excludes
    • congenital insufficiency of cardiac valve NOS (Q24.8)
    • congenital stenosis of cardiac valve NOS (Q24.8)
    • endocardial fibroelastosis (I42.4)
    • endocarditis specified as rheumatic (I09.1)
    • due to
      • Q fever A78
    • Coxiella burnetii A78
    • Q fever A78
  • 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 2021 2022 Billable/Specific Code
    Applicable To
    • Fever NOS
    • Fever of unknown origin [FUO]
    • Fever with chills
    • Fever with rigors
    • Hyperpyrexia NOS
    • Persistent fever
    • Pyrexia NOS
    • Australian Q A78
    • Nine-Mile A78
    • Q A78
    • quadrilateral A78
  • Grippe, grippal - see also Influenza
    • Balkan A78
  • Infection, infected, infective (opportunistic) B99.9
    ICD-10-CM Diagnosis Code B99.9

    Unspecified infectious disease

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • Coxiella burnetii A78
    • Q fever A78
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) J18.9
    ICD-10-CM Diagnosis Code J18.9

    Pneumonia, unspecified organism

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • in (due to)
      • Q fever A78
  • Q fever A78
    • with pneumonia A78
  • Quadrilateral fever A78

ICD-10-CM Codes Adjacent To A78
A77.0 Spotted fever due to Rickettsia rickettsii
A77.1 Spotted fever due to Rickettsia conorii
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
A79.82 Anaplasmosis [A. phagocytophilum]
A79.89 Other specified rickettsioses
A79.9 Rickettsiosis, unspecified
A80 Acute poliomyelitis
A80.0 Acute paralytic poliomyelitis, vaccine-associated

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