C7A.1 Malignant poorly differentiated neuroendocrine tumors

The ICD-10-CM code for Malignant poorly differentiated neuroendocrine tumors is C7A.1 (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.1:

• Carcinoma (malignant) › neuroendocrine › poorly differentiated, any site
• Carcinoma (malignant) › neuroendocrine › high grade, any site
• Tumor › neuroendocrine › malignant poorly differentiated

Inclusion Terms

• Malignant poorly differentiated neuroendocrine tumor NOS
• Malignant poorly differentiated neuroendocrine carcinoma, any site
• High grade neuroendocrine carcinoma, any site

U.S. Hospital Utilization

• An estimated 8,810 U.S. inpatient stays in 2023 included C7A.1 among the documented diagnoses.
• 2,940 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)

Cite This Page

Reference C7A.1 with the canonical source and edition:

C7A.1 — Malignant poorly differentiated neuroendocrine tumors. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/C7A.1

Canonical URL: https://icd10codingpro.com/codes/C7A.1