C78
ICD-10Non-billable categorySecondary malignant neoplasm of resp and digestive organs
Official ICD-10-CM descriptor (FY2026)
Secondary malignant neoplasm of respiratory and digestive organs
C78 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- secondary carcinoid tumors of liver (C7B.02)
- secondary carcinoid tumors of peritoneum (C7B.04)
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- lymph node metastases (C77.0)
More specific codes under C78
- C78.0Secondary malignant neoplasm of lungcategory
- C78.1Secondary malignant neoplasm of mediastinum
- C78.2Secondary malignant neoplasm of pleura
- C78.3Secondary malignant neoplasm of and unsp respiratory organscategory
- C78.4Secondary malignant neoplasm of small intestine
- C78.5Secondary malignant neoplasm of large intestine and rectum
- C78.6Secondary malignant neoplasm of retroperiton and peritoneum
- C78.7Secondary malig neoplasm of liver and intrahepatic bile duct
- C78.8Secondary malignant neoplasm of and unsp digestive organscategory
Where this code sits
- Chapter
- 2. Neoplasms (C00-D49)
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.