Malignant neuroendocrine tumors
chapter 2: Neoplasms
23 billable codes under C7A: all are a CC; all map to HCC 21 (Lymphoma and Other Cancers).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.
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Instructional notes
Excludes2: not included here, code separately if applicable
Code also: add a code for this too, order depends on the encounter
- any associated multiple endocrine neoplasia [MEN] syndromes (E31.2-)
Use additional code: add a second code for this, listed after this one
- code to identify any associated endocrine syndrome, such as:
- carcinoid syndrome (E34.00)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Rules for coding benign and malignant neoplasms: using the Neoplasm Table, sequencing primary and secondary sites, treatment encounters, complications, and current cancer versus personal history.
- Admission/Encounter for treatment of primary site (page 33)
- Admission/Encounter for treatment of secondary site (page 33)
- Coding and sequencing of complications (page 34)
- Primary malignancy previously excised (page 34)
- Admissions/Encounters involving antineoplastic chemotherapy, immunotherapy and radiation therapy (page 35)
- Admission/encounter to determine extent of malignancy (page 36)
- Symptoms, signs, and abnormal findings listed in Chapter 18 associated with neoplasms (page 36)
- Admission/encounter for pain control/management (page 36)
All codes under C7A
C7A can't be used on a claim. Pick a billable code below; grey headings group them.
- C7A.0Malignant carcinoid tumors
- C7A.00Malignant carcinoid tumor of unspecified site
- C7A.01Malignant carcinoid tumors of the small intestine
- C7A.010Malignant carcinoid tumor of the duodenum
- C7A.011Malignant carcinoid tumor of the jejunum
- C7A.012Malignant carcinoid tumor of the ileum
- C7A.019Malignant carcinoid tumor of the small intestine, unspecified portion
- C7A.02Malignant carcinoid tumors of the appendix, large intestine, and rectum
- C7A.020Malignant carcinoid tumor of the appendix
- C7A.021Malignant carcinoid tumor of the cecum
- C7A.022Malignant carcinoid tumor of the ascending colon
- C7A.023Malignant carcinoid tumor of the transverse colon
- C7A.024Malignant carcinoid tumor of the descending colon
- C7A.025Malignant carcinoid tumor of the sigmoid colon
- C7A.026Malignant carcinoid tumor of the rectum
- C7A.029Malignant carcinoid tumor of the large intestine, unspecified portion
- C7A.09Malignant carcinoid tumors of other sites
- C7A.090Malignant carcinoid tumor of the bronchus and lung
- C7A.091Malignant carcinoid tumor of the thymus
- C7A.092Malignant carcinoid tumor of the stomach
- C7A.093Malignant carcinoid tumor of the kidney
- C7A.094Malignant carcinoid tumor of the foregut, unspecified
- C7A.095Malignant carcinoid tumor of the midgut, unspecified
- C7A.096Malignant carcinoid tumor of the hindgut, unspecified
- C7A.098Malignant carcinoid tumors of other sites
- C7A.1Malignant poorly differentiated neuroendocrine tumors
- C7A.8Other malignant neuroendocrine tumors
C7A MS-DRGs
As the principal diagnosis, the billable codes under C7A group to these 20 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 374 Digestive Malignancy with MCC (16 of 23 codes)
- DRG 375 Digestive Malignancy with CC (16 of 23 codes)
- DRG 376 Digestive Malignancy without CC/MCC (16 of 23 codes)
- DRG 826 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with MCC (5 of 23 codes)
- DRG 827 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with CC (5 of 23 codes)
- DRG 828 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures without CC/MCC (5 of 23 codes)
- DRG 829 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures with CC/MCC (5 of 23 codes)
- DRG 830 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures without CC/MCC (5 of 23 codes)
- DRG 843 Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with MCC (5 of 23 codes)
- DRG 844 Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with CC (5 of 23 codes)
- DRG 845 Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses without CC/MCC (5 of 23 codes)
- DRG 180 Respiratory Neoplasms with MCC (1 of 23 codes)
- DRG 181 Respiratory Neoplasms with CC (1 of 23 codes)
- DRG 182 Respiratory Neoplasms without CC/MCC (1 of 23 codes)
- DRG 656 Kidney and Ureter Procedures for Neoplasm with MCC (1 of 23 codes)
- DRG 657 Kidney and Ureter Procedures for Neoplasm with CC (1 of 23 codes)
- DRG 658 Kidney and Ureter Procedures for Neoplasm without CC/MCC (1 of 23 codes)
- DRG 686 Kidney and Urinary Tract Neoplasms with MCC (1 of 23 codes)
- DRG 687 Kidney and Urinary Tract Neoplasms with CC (1 of 23 codes)
- DRG 688 Kidney and Urinary Tract Neoplasms without CC/MCC (1 of 23 codes)
Other codes that refer to C7A
Notes on these codes point to C7A.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Cancer
Cancer is not just one disease but many diseases. Cancer begins in your cells, which are the building blocks of your body. Usually, your body forms new cells as needed, replacing old cells that die. Sometimes this process goes wrong. New cells grow even when you don't need them, and old cells don't die when they should. These extra cells can form a mass called a tumor.
Read more about cancer on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.