ICD-10-CM 2027 diagnosis code
A37.0Whooping cough due to Bordetella pertussis
A37.0 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About A37.0
A37.0 is the ICD-10-CM diagnosis code for whooping cough due to Bordetella pertussis. It belongs to category A37 (whooping cough), block A30-A49 (other bacterial diseases) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.
Within A37 (whooping cough), A37.0 is specifically for whooping cough due to Bordetella pertussis. Related codes cover due to Bordetella parapertussis (A37.1), due to other Bordetella species (A37.8) and unspecified species (A37.9).
To report this condition, pick the subcode that matches the documentation: A37.00 (without pneumonia) and A37.01 (with pneumonia).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under A37.0
Notes that apply from higher levels
Instructions written at a parent level also apply to A37.0.
Broader instructions also apply from Chapter 1: Certain infectious and parasitic diseases.
Codes whose notes reference A37.0
- R05Excludes1
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about A37.0
Is A37.0 billable?
- No. A37.0 is a header code. Report one of its more specific subcodes instead.