ICD-10-CM Diagnosis Code C09.9
Diagnosis Code: C09.9 (Raw: C099)
Description: Malignant neoplasm of tonsil, unspecified
Classification: International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM)
Fiscal Year: 2026
CMS Section 111 Status: Valid for reporting.
Overview & Clinical Details
ICD-10-CM code C09.9 is designated for Malignant neoplasm of tonsil, unspecified. In medical documentation and insurance billing, this code is utilized to specify medical diagnosis for patient records, reimbursement workflows, and compliance under CMS Section 111 mandatory insurer reporting guidelines.