ICD-10 Code A37.0 – Whooping cough due to Bordetella pertussis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A37.0 – Whooping cough due to Bordetella pertussis
What it is
A37.0 identifies pertussis, or whooping cough, caused by Bordetella pertussis. Use it when the record clearly documents this specific bacterial infection.
Clinical signs
Typical findings include paroxysmal coughing spells, inspiratory whoop, and posttussive vomiting. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents confirmed or presumed whooping cough due to Bordetella pertussis. It also fits when the note states pertussis with the organism identified. Code from the final diagnostic statement, not from symptoms alone.
Do not use for
Do not use it for other causes of cough or for pertussis without documented Bordetella pertussis. Check documentation if the organism is not specified.
Coding tip
Confirm that Bordetella pertussis is named in the assessment, discharge diagnosis, or lab-supported documentation before assigning A37.0.