C7A.020 Malignant carcinoid tumor of the appendix

The ICD-10-CM code for Malignant carcinoid tumor of the appendix is C7A.020 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

2: Neoplasms (C00-D49)

Section

C7A: Malignant neuroendocrine tumors (C7A)

Category C7A

28 codes (23 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to C7A.020:

• Tumor › carcinoid › malignant › appendix

U.S. Hospital Utilization

• An estimated 360 U.S. inpatient stays in 2023 included C7A.020 among the documented diagnoses.
• 160 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)