1. ICD-10-CM Codes
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2. A00-B99
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3. A75-A79
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4. A78-
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5. 2023 ICD-10-CM Diagnosis Code A78

2023 ICD-10-CM Diagnosis Code A78

Q fever

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• A78 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2023 edition of ICD-10-CM A78 became effective on October 1, 2022.
• This is the American ICD-10-CM version of A78 - other international versions of ICD-10 A78 may differ.

• 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).

• 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

• 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
• 2023 (effective 10/1/2022): No change

• Code First: J17
  , I39
  ICD-10-CM Diagnosis Code J17

  Pneumonia in diseases classified elsewhere

  2016 2017 2018 2019 2020 2021 2022 2023 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 2023 Billable/Specific Code Manifestation Code

  Code First

  • underlying disease, such as:
  • Q fever (A78)

  Type 1 Excludes

  • endocardial involvement in:
  • candidiasis (B37.6)
  • gonococcal infection (A54.83)
  • Libman-Sacks disease (M32.11)
  • listerosis (A32.82)
  • meningococcal infection (A39.51)
  • rheumatoid arthritis (M05.31)
  • syphilis (A52.03)
  • tuberculosis (A18.84)
  • typhoid fever (A01.02)

• 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 2023 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 2023 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 2023 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 2023 Billable/Specific Code
  • in (due to)
    • Q fever A78
• Q fever A78
  • with pneumonia A78
• Quadrilateral fever A78

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