Malignant poorly differentiated neuroendocrine tumors

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2010 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

FY2010 Added to the draft code set draft Malignant poorly differentiated neuroendocrine tumors

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from C7A Malignant neuroendocrine tumors

Excludes2 - not included here

malignant pancreatic islet cell tumors (C25.4)
Merkel cell carcinoma (C4A.-)

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-)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Carcinoma > neuroendocrine
Carcinoma > neuroendocrine > high grade, any site
Tumor > neuroendocrine > malignant poorly differentiated
Carcinoma > neuroendocrine > poorly differentiated, any site

Codes in the same group

Code	Description	Status
C7A.0	Malignant carcinoid tumors	Not billable
C7A.8	Other malignant neuroendocrine tumors	Valid