C77.4 – Secondary and unspecified malignant neoplasm of inguinal and lower limb lymph nodes
ICD-10-CM 2027 diagnosis code · Malignant neoplasms of ill-defined, other secondary and unspecified sites
- Code
C77.4(claims format:C774)- Description
- Secondary and unspecified malignant neoplasm of inguinal and lower limb lymph nodes
- Short description
- Sec and unsp malig neoplasm of inguinal and lower limb nodes
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 2. Neoplasms (C00-D49)
- Block
- C76-C80 Malignant neoplasms of ill-defined, other secondary and unspecified sites
- Parent codes
- C77
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
C77 – Secondary and unspecified malignant neoplasm of lymph nodes
Related codes in C77
- C77.0 – Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neckBillable
- C77.1 – Secondary and unspecified malignant neoplasm of intrathoracic lymph nodesBillable
- C77.2 – Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodesBillable
- C77.3 – Secondary and unspecified malignant neoplasm of axilla and upper limb lymph nodesBillable
- C77.5 – Secondary and unspecified malignant neoplasm of intrapelvic lymph nodesBillable
- C77.8 – Secondary and unspecified malignant neoplasm of lymph nodes of multiple regionsBillable
- C77.9 – Secondary and unspecified malignant neoplasm of lymph node, unspecifiedBillable
Frequently asked questions
What is ICD-10 code C77.4?
C77.4 is the ICD-10-CM code for secondary and unspecified malignant neoplasm of inguinal and lower limb lymph nodes, in the block C76-C80 (Malignant neoplasms of ill-defined, other secondary and unspecified sites).
Is C77.4 a billable code?
Yes. C77.4 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does C77.4 belong to?
It belongs to category C77 – Secondary and unspecified malignant neoplasm of lymph nodes.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.