2024 ICD-10-CM Diagnosis Code C09

Malignant neoplasm of tonsil

  • C09 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2024 edition of ICD-10-CM C09 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of C09 – other international versions of ICD-10 C09 may differ.

Use Additional

  • code to identify:
  • alcohol abuse and dependence (F10.-)
  • exposure to environmental tobacco smoke (Z77.22)
  • exposure to tobacco smoke in the perinatal period (P96.81)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Type 2 Excludes

  • malignant neoplasm of lingual tonsil (C02.4)
  • malignant neoplasm of pharyngeal tonsil (C11.1)

The following code(s) above C09 contain annotation back-references

 that may be applicable to C09:

Clinical Information

  • Malignant neoplasm of the tonsils.

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

Code annotations containing back-references to C09:

  • Type 2 Excludes: C10