C7A.1

Billable

ChapterC00–D49

Ranksubcategory

Official Description

Malignant poorly differentiated neuroendocrine tumors

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 2: Neoplasms (C00-D49).

Instructional Notes

Includes

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

General instructions are available for the parent sections:

View C7A Notes

Clinical Hierarchy

CH2Neoplasms (C00-D49)

C7AMalignant neuroendocrine tumors

C7A.1Malignant poorly differentiated neuroendocrine tumors

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to C7A.1:

categoryC7A

Malignant neuroendocrine tumors

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to C7A.1. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

3 raw paths

Carcinoma (malignant)2 unique routes

neuroendocrine(2 variants)

high grade, any site→C7A.1

poorly differentiated, any site→C7A.1

Tumor1 unique routes

neuroendocrine

malignant poorly differentiated→C7A.1

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 826

Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with MCC

DRG 827

Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with CC

DRG 828

Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures without CC/MCC

DRG 829

Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures with CC/MCC

DRG 830

Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures without CC/MCC

DRG 843

Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with MCC

DRG 844

Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with CC

DRG 845

Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses without CC/MCC

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Malignant poorly differentiated neuroendocrine tumors.

Search PCS Codes