ICD-9-CM Diagnosis Code 474.02
Diagnosis Code: 474.02 (Raw: 47402)
Description: Chronic tonsillitis and adenoiditis
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 474.02 is designated for Chronic tonsillitis and adenoiditis. While superseded by ICD-10 for current healthcare encounters, it remains a recognized reference code for CMS Section 111 reporting, legacy claims adjudication, and historical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.