C7A.1 – Malignant poorly differentiated neuroendocrine tumors
ICD-10-CM 2027 diagnosis code · Malignant neuroendocrine tumors (C7A)
ICD-10-CM code
C7A.1
- Code
C7A.1(claims format:C7A1)- Description
- Malignant poorly differentiated neuroendocrine tumors
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 2. Neoplasms (C00-D49)
- Block
- C7A Malignant neuroendocrine tumors (C7A)
- Parent codes
- C7A
Notes for C7A.1
Applicable to:
- Malignant poorly differentiated neuroendocrine tumor NOS
- Malignant poorly differentiated neuroendocrine carcinoma, any site
- High grade neuroendocrine carcinoma, any site
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
C7A – Malignant neuroendocrine tumors
Excludes2 (not included here):
Use additional code:
- code to identify any associated endocrine syndrome, such as:
- carcinoid syndrome (E34.00)
Code also:
- any associated multiple endocrine neoplasia [MEN] syndromes (E31.2-)
Index terms for C7A.1
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in C7A
Frequently asked questions
What is ICD-10 code C7A.1?
C7A.1 is the ICD-10-CM code for malignant poorly differentiated neuroendocrine tumors, in the block C7A (Malignant neuroendocrine tumors (C7A)).
Is C7A.1 a billable code?
Yes. C7A.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does C7A.1 belong to?
It belongs to category C7A – Malignant neuroendocrine tumors.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.