ICD-9 Code 209.51 - Benign carcinoid tumor of the appendix

ICD-9-CM Diagnosis Code 209.51

Diagnosis Code: 209.51 (Raw: 20951)

Description: Benign carcinoid tumor of the appendix

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 209.51 is designated for Benign carcinoid tumor of the appendix. While superseded by ICD-10 for current healthcare encounters, it remains a recognized reference code for CMS Section 111 reporting, legacy claims adjudication, and historical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.