C77Header code — not billable
Secondary and unspecified malignant neoplasm of lymph nodes
- Chapter
- 2. Neoplasms
- Category
- C77
- Effective date
- October 1, 2026
Related codes in category C77
C77.0Sec and unsp malig neoplasm of nodes of head, face and neckYesC77.1Secondary and unsp malignant neoplasm of intrathorac nodesYesC77.2Secondary and unsp malignant neoplasm of intra-abd nodesYesC77.3Sec and unsp malig neoplasm of axilla and upper limb nodesYesC77.4Sec and unsp malig neoplasm of inguinal and lower limb nodesYesC77.5Secondary and unsp malignant neoplasm of intrapelv nodesYesC77.8Sec and unsp malig neoplasm of nodes of multiple regionsYesC77.9Secondary and unsp malignant neoplasm of lymph node, unspYes
Frequently asked questions
What is ICD-10 code C77?
C77 is an ICD-10-CM diagnosis code for Secondary and unspecified malignant neoplasm of lymph nodes.
Is C77 a billable code?
No. C77 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is C77 in?
C77 falls under Chapter 2: Neoplasms.
When did C77 become effective?
C77 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to C77?
C77 belongs to category C77, which includes 8 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.