Whooping cough
In Other bacterial diseases (A30-A49), chapter 1: Certain Infectious and Parasitic Diseases
8 billable codes under A37: 4 are an MCC, 4 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Rules for coding infections and parasitic diseases, including HIV, organism and drug resistance codes, sepsis and septic shock, MRSA, Zika, and COVID-19.
- Human Immunodeficiency Virus (HIV) Infections (page 19)
- Infectious agents as the cause of diseases classified to other chapters (page 22)
- Infections resistant to antibiotics (page 22)
- Sepsis, Severe Sepsis, and Septic Shock (page 23)
- Methicillin Resistant Staphylococcus aureus (MRSA) Conditions (page 27)
- Zika virus infections (page 28)
- Coronavirus infections (page 28)
All codes under A37
A37 can't be used on a claim. Pick a billable code below; grey headings group them.
- A37.0Whooping cough due to Bordetella pertussis
- A37.00Whooping cough due to Bordetella pertussis without pneumonia
- A37.01Whooping cough due to Bordetella pertussis with pneumonia
- A37.1Whooping cough due to Bordetella parapertussis
- A37.10Whooping cough due to Bordetella parapertussis without pneumonia
- A37.11Whooping cough due to Bordetella parapertussis with pneumonia
- A37.8Whooping cough due to other Bordetella species
- A37.80Whooping cough due to other Bordetella species without pneumonia
- A37.81Whooping cough due to other Bordetella species with pneumonia
- A37.9Whooping cough, unspecified species
- A37.90Whooping cough, unspecified species without pneumonia
- A37.91Whooping cough, unspecified species with pneumonia
A37 MS-DRGs
As the principal diagnosis, all 8 billable codes under A37 group to MS-DRG 202 or 203 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Other codes that refer to A37
Notes on these codes point to A37.
- J17 Excludes1: whooping cough with pneumonia (A37 with fifth-character 1)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Whooping Cough
Whooping cough, or pertussis, is a respiratory infection that can cause coughing fits. In serious cases, the coughing can become violent and rapid. You may cough so hard that you vomit. The name of the disease comes from the whooping noise you might make when you try to breathe in after coughing.
Read more about whooping cough on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.