U.S. ICD-10-CM · FY 2027

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.

Code definition

Official description

C77

Secondary and unspecified malignant neoplasm of lymph nodes

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where C77 sits

  1. 1

    Chapter 2

    Neoplasms (C00-D49)

  2. 2

    Section

    Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80)

  3. 3

    Category C77

    Secondary and unspecified malignant neoplasm of lymph nodes

  4. 4

    Code C77

    Secondary and unspecified malignant neoplasm of lymph nodes

More specific choices

Codes under C77

C77 is a non-billable category. Choose the child code that best matches the documented diagnosis.

C77.0

Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck

C77.1

Secondary and unspecified malignant neoplasm of intrathoracic lymph nodes

C77.2

Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodes

C77.3

Secondary and unspecified malignant neoplasm of axilla and upper limb lymph nodes

C77.4

Secondary and unspecified malignant neoplasm of inguinal and lower limb lymph nodes

C77.5

Secondary and unspecified malignant neoplasm of intrapelvic lymph nodes

C77.8

Secondary and unspecified malignant neoplasm of lymph nodes of multiple regions

C77.9

Secondary and unspecified malignant neoplasm of lymph node, unspecified

Documentation details

Notes 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.

Transparency

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.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

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.

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