C7A.1
Billable codeMalignant poorly differentiated neuroendocrine tumors
The ICD-10 code for malignant poorly differentiated neuroendocrine tumors is C7A.1.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Malignant poorly differentiated neuroendocrine tumor NOS
- Malignant poorly differentiated neuroendocrine carcinoma, any site
- High grade neuroendocrine carcinoma, any site
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- C7A.0Malignant carcinoid tumorsnon-billable header
- C7A.8Other malignant neuroendocrine tumors
- C7A.1Malignant poorly differentiated neuroendocrine tumors
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 20930Approximate match
Associated MS-DRGs
C7A.1 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.
- DRG 814Reticuloendothelial and Immunity Disorders with MCC
- DRG 815Reticuloendothelial and Immunity Disorders with CC
- DRG 816Reticuloendothelial and Immunity Disorders without CC/MCC
- DRG 826Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with MCC
- DRG 827Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with CC
- DRG 828Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures without CC/MCC
- DRG 829Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures with CC/MCC
- DRG 830Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures without CC/MCC
- DRG 843Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with MCC
- DRG 844Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with CC
- DRG 845Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses without CC/MCC