Whooping cough (A37) ICD-10-CM
The A37 code range covers whooping cough with 13 ICD-10-CM diagnosis codes. 8 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the A37 Range 13 codes · 8 billable
- A37 Whooping coughNon-billable
- A37.0 Whooping cough due to Bordetella pertussisNon-billable
- A37.00 Whooping cough due to Bordetella pertussis without pneumonia
- A37.01 Whooping cough due to Bordetella pertussis with pneumonia
- A37.1 Whooping cough due to Bordetella parapertussisNon-billable
- A37.10 Whooping cough due to Bordetella parapertussis without pneumonia
- A37.11 Whooping cough due to Bordetella parapertussis with pneumonia
- A37.8 Whooping cough due to other Bordetella speciesNon-billable
- A37.80 Whooping cough due to other Bordetella species without pneumonia
- A37.81 Whooping cough due to other Bordetella species with pneumonia
- A37.9 Whooping cough, unspecified speciesNon-billable
- A37.90 Whooping cough, unspecified species without pneumonia
- A37.91 Whooping cough, unspecified species with pneumonia
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A37 range.
Bordetella pertussis
A species of gram-negative, aerobic bacteria that is the causative agent of WHOOPING COUGH. Its cells are minute coccobacilli that are surrounded by a slime sheath.
Whooping Cough
A respiratory infection caused by BORDETELLA PERTUSSIS and characterized by paroxysmal coughing ending in a prolonged crowing intake of breath.
About the A37 Code Range
The ICD-10 code A37 covers whooping cough, a contagious respiratory infection also known as pertussis. These codes specify the causative Bordetella species and whether pneumonia is present.
The section includes codes for whooping cough due to Bordetella pertussis (A37.0 series), Bordetella parapertussis (A37.1 series), other Bordetella species (A37.8 series), and unspecified species (A37.9 series). Subcategories distinguish cases with or without pneumonia — for example, A37.00 is whooping cough caused by Bordetella pertussis without pneumonia, also referred to as acute bacterial bronchitis or healthcare-associated pertussis. Codes with pneumonia, like A37.01, capture cases complicated by lung infection. This section helps coders accurately assign diagnosis codes for pertussis and related infections, guiding treatment and reporting. Understanding synonyms like “pertussis” or “infection caused by Bordetella” assists healthcare professionals in mapping clinical terms to the proper ICD-10 code for whooping cough diagnoses.
Questions About This Page
How many billable codes are in the A37 range?
Of the 13 codes in this range, 8 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the A37 range classify?
The range classifies whooping cough. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
