C77
ICD-10Non-billable categorySecondary and unspecified malignant neoplasm of lymph nodes
Official ICD-10-CM descriptor (FY2026)
Secondary and unspecified malignant neoplasm of lymph nodes
C77 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.
- malignant neoplasm of lymph nodes, specified as primary (C81-C86, C88, C96.-)
- mesentery metastasis of carcinoid tumor (C7B.04)
- secondary carcinoid tumors of distant lymph nodes (C7B.01)
More specific codes under C77
- C77.0Sec and unsp malig neoplasm of nodes of head, face and neck
- C77.1Secondary and unsp malignant neoplasm of intrathorac nodes
- C77.2Secondary and unsp malignant neoplasm of intra-abd nodes
- C77.3Sec and unsp malig neoplasm of axilla and upper limb nodes
- C77.4Sec and unsp malig neoplasm of inguinal and lower limb nodes
- C77.5Secondary and unsp malignant neoplasm of intrapelv nodes
- C77.8Sec and unsp malig neoplasm of nodes of multiple regions
- C77.9Secondary and unsp malignant neoplasm of lymph node, unsp
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.