1. C09 Malignant neoplasm of tonsil

    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)


    • malignant neoplasm of lingual tonsil (C02.4)
    • malignant neoplasm of pharyngeal tonsil (C11.1)
    1. C09.0 Malignant neoplasm of tonsillar fossa

    2. C09.1 Malignant neoplasm of tonsillar pillar (anterior) (posterior)

    3. C09.8 Malignant neoplasm of overlapping sites of tonsil

    4. C09.9 Malignant neoplasm of tonsil, unspecified

      Inclusion term(s):

      • Malignant neoplasm of tonsil NOS
      • Malignant neoplasm of faucial tonsils
      • Malignant neoplasm of palatine tonsils
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.