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HomeICD CodesICD-9 Code 033.0 - Whooping cough due to bordetella pertussis [B. pertussis]
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ICD-9 Code 033.0 - Whooping cough due to bordetella pertussis [B. pertussis]

Reviewed by Medicinsk Expert•Last updated: 2026-10-22•ICD Codes

ICD-9-CM Diagnosis Code 033.0

Diagnosis Code: 033.0 (Raw: 0330)

Description: Whooping cough due to bordetella pertussis [B. pertussis]

Classification: International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM)

Fiscal Year: 2026 Reference

CMS Section 111 Status: Valid for reporting.

Overview & Historical Usage

ICD-9-CM code 033.0 is designated for Whooping cough due to bordetella pertussis [B. pertussis]. While superseded by ICD-10 for current healthcare encounters, it remains a recognized reference code for CMS Section 111 reporting, legacy claims adjudication, and historical clinical data analysis.

Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.