C77 ICD-10-CM Code: Secondary and unspecified malignant neoplasm of lymph nodes
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
C77Secondary and unspecified malignant neoplasm of lymph nodes
ICD-10-CM diagnosis code · United States clinical modification
Where C77 sits
- 1
Chapter 2
Neoplasms (C00-D49)
- 2
Section
Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80)
- 3
Category C77
Secondary and unspecified malignant neoplasm of lymph nodes
- 4
Code C77
Secondary and unspecified malignant neoplasm of lymph nodes
Codes under C77
C77 is a non-billable category. Choose the child code that best matches the documented diagnosis.
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, unspecifiedNotes for this code
Inclusion terms
No inclusion terms are listed for C77.
Code first
No “code first” instruction is listed for C77.
Use additional code
No “use additional code” instruction is listed for C77.
Excludes1
Conditions that should not be reported together with this code.
- 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)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for C77.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code C77 mean?
C77 is the FY 2027 U.S. ICD-10-CM code for “Secondary and unspecified malignant neoplasm of lymph nodes.”
Is C77 a billable or specific ICD-10-CM code?
No. C77 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is C77 located in ICD-10-CM?
C77 is listed in Chapter 2, Neoplasms (C00-D49), within Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80) (C76–C80), under category C77, Secondary and unspecified malignant neoplasm of lymph nodes.
What coding notes are listed for C77?
No inclusion terms are listed for C77 in this reference record. No code-first instruction is listed. Excludes1 notes: 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). No Excludes2 note is listed.