2026 ICD-10-CM Diagnosis Code A37.80Whooping cough due to other Bordetella species without pneumonia
ICD-10-CM Codes›A00–B99›A30-A49›A37
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
A37.80 is a billable ICD-10-CM diagnosis code for whooping cough due to other Bordetella species without pneumonia. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 202 through 203. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 8 closely related codes. Coders also document this condition as infection caused by Bordetella. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Infection caused by Bordetella
- Infection caused by Bordetella bronchiseptica
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Tracheobronchitis (15 years of age and above) See Also: Bronchitis;
Bordetella bronchiseptica A37.80
bronchiseptica A37.80
specified NEC A37.80
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
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.
The full article covers:
- What is whooping cough?
- What causes whooping cough?
- What are the symptoms of whooping cough?
- How is whooping cough diagnosed?
- What are the treatments for whooping cough?
- Can whooping cough be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert A37.80 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About A37.80Overview
What is the ICD-10 code for whooping cough due to other Bordetella species without pneumonia?
The ICD-10-CM code for whooping cough due to other Bordetella species without pneumonia is A37.80 (sometimes written as A3780). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is A37.80 (Whooping cough due to other Bordetella species) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report whooping cough due to other Bordetella species without pneumonia on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does A37.80 group to?
When whooping cough due to other Bordetella species without pneumonia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 202, 203, with relative weights from 0.6700 to 0.9712 depending on complications. Higher weights mean higher Medicare reimbursement.
Is A37.80 a CC or MCC?
CMS lists A37.80 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 8 closely related codes in its exclusion list.
What is the ICD-9 equivalent of A37.80?
Under the General Equivalence Mappings, whooping cough due to other Bordetella species without pneumonia converts to ICD-9-CM 033.8 (whooping cough NEC). The mapping is approximate, so confirm the match fits the documentation.
