2025 ICD-10-CM Diagnosis Code C77

by

Secondary and unspecified malignant neoplasm of lymph nodes

  • C77 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2025 edition of ICD-10-CM C77 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of C77 – other international versions of ICD-10 C77 may differ.

Type 1 Excludes

  • malignant neoplasm of lymph nodes, specified as primary (C81-C86, C88, C96.-)
  • mesentary metastasis of carcinoid tumor (C7B.04)
  • secondary carcinoid tumors of distant lymph nodes (C7B.01)

The following code(s) above C77 contain annotation back-references

 that may be applicable to C77:

Clinical Information

  • The spread of cancer to and establishment in the lymph nodes

Code History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change
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