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C77

⚠ Non-billable (Header)

Secondary and unspecified malignant neoplasm of lymph nodes

Neoplasms (C00-D49)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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❌ Excludes1

direct

These codes are mutually exclusive. Never code them together.

  • • 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)

Child Codes (8)

C77.0Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neckC77.1Secondary and unspecified malignant neoplasm of intrathoracic lymph nodesC77.2Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodesC77.3Secondary and unspecified malignant neoplasm of axilla and upper limb lymph nodesC77.4Secondary and unspecified malignant neoplasm of inguinal and lower limb lymph nodesC77.5Secondary and unspecified malignant neoplasm of intrapelvic lymph nodesC77.8Secondary and unspecified malignant neoplasm of lymph nodes of multiple regionsC77.9Secondary and unspecified malignant neoplasm of lymph node, unspecified

Clinical Description

ICD-10-CM code C77 represents secondary and unspecified malignant neoplasm of lymph nodes. This code falls under the Neoplasms (C00-D49) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

Frequently Asked Questions

What is ICD-10 code C77?

ICD-10-CM code C77 is "Secondary and unspecified malignant neoplasm of lymph nodes". It belongs to the category: Neoplasms (C00-D49).

Is C77 a billable ICD-10 code?

No, C77 is a non-billable header code. A more specific child code must be used for billing.

What codes are excluded with C77?

C77 has 3 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

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Code Information

CodeC77
BillableNo — Header code
CategoryNeoplasms (C00-D49)
Excludes13 rule(s)
Excludes20 note(s)
Child codes8

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)