Is ICD-10-CM code C7B billable?

No, C7B (Secondary neuroendocrine tumors) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code C7B belong to?

C7B belongs to Chapter 2 of the ICD-10-CM tabular list: C00–D49 (Neoplasms).

C7BNot billable, use a more specific code below

Secondary neuroendocrine tumors

chapter 2: Neoplasms

8 billable codes under C7B: 6 are a CC; all map to HCC 17 (Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic).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.

Instructional notes

Use additional code: add a second code for this, listed after this one

code to identify any functional activity

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)

Read Section I.C.2 (page 32), 12 more topics

All codes under C7B

C7B can't be used on a claim. Pick a billable code below; grey headings group them.

C7B MS-DRGs

As the principal diagnosis, the billable codes under C7B group to these 29 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 826 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with MCC (4 of 8 codes)
DRG 827 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with CC (4 of 8 codes)
DRG 828 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures without CC/MCC (4 of 8 codes)
DRG 829 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures with CC/MCC (4 of 8 codes)
DRG 830 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures without CC/MCC (4 of 8 codes)
DRG 843 Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with MCC (4 of 8 codes)
DRG 844 Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with CC (4 of 8 codes)
DRG 845 Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses without CC/MCC (4 of 8 codes)
DRG 374 Digestive Malignancy with MCC (1 of 8 codes)
DRG 375 Digestive Malignancy with CC (1 of 8 codes)
DRG 376 Digestive Malignancy without CC/MCC (1 of 8 codes)
DRG 435 Malignancy of Hepatobiliary System or Pancreas with MCC (1 of 8 codes)
DRG 436 Malignancy of Hepatobiliary System or Pancreas with CC (1 of 8 codes)
DRG 437 Malignancy of Hepatobiliary System or Pancreas without CC/MCC (1 of 8 codes)
DRG 456 Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with MCC (1 of 8 codes)
DRG 457 Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with CC (1 of 8 codes)
DRG 458 Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection without CC/MCC (1 of 8 codes)
DRG 542 Pathological Fractures and Musculoskeletal and Connective Tissue Malignancy with MCC (1 of 8 codes)
DRG 543 Pathological Fractures and Musculoskeletal and Connective Tissue Malignancy with CC (1 of 8 codes)
DRG 544 Pathological Fractures and Musculoskeletal and Connective Tissue Malignancy without CC/MCC (1 of 8 codes)
DRG 820 Lymphoma and Leukemia with Major O.R. Procedures with MCC (1 of 8 codes)
DRG 821 Lymphoma and Leukemia with Major O.R. Procedures with CC (1 of 8 codes)
DRG 822 Lymphoma and Leukemia with Major O.R. Procedures without CC/MCC (1 of 8 codes)
DRG 823 Lymphoma and Non-Acute Leukemia with Other Procedures with MCC (1 of 8 codes)
DRG 824 Lymphoma and Non-Acute Leukemia with Other Procedures with CC (1 of 8 codes)
DRG 825 Lymphoma and Non-Acute Leukemia with Other Procedures without CC/MCC (1 of 8 codes)
DRG 840 Lymphoma and Non-Acute Leukemia with MCC (1 of 8 codes)
DRG 841 Lymphoma and Non-Acute Leukemia with CC (1 of 8 codes)
DRG 842 Lymphoma and Non-Acute Leukemia without CC/MCC (1 of 8 codes)

Other codes that refer to C7B

Notes on these codes point to C7B.

C79 Excludes1: secondary carcinoid tumors (C7B.-)
C79 Excludes1: secondary neuroendocrine tumors (C7B.-)
E34.0 Code Also: secondary neuroendocrine tumors (C7B.-)

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.

Endocrine Diseases

Your endocrine system includes eight major glands throughout your body. These glands make hormones. Hormones are chemical messengers. They travel through your bloodstream to tissues or organs. Hormones work slowly and affect body processes from head to toe. These include:

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.