1. C06 Malignant neoplasm of other and unspecified parts of mouth

    Use Additional code to identify:
    alcohol abuse and dependence (F10.-)
    history of tobacco dependence (Z87.891)
    tobacco dependence (F17.-)
    tobacco use (Z72.0)

    1. C06.0 Malignant neoplasm of cheek mucosa

      Inclusion term(s):

      • Malignant neoplasm of buccal mucosa NOS
      • Malignant neoplasm of internal cheek
    2. C06.1 Malignant neoplasm of vestibule of mouth

      Inclusion term(s):

      • Malignant neoplasm of buccal sulcus (upper) (lower)
      • Malignant neoplasm of labial sulcus (upper) (lower)
    3. C06.2 Malignant neoplasm of retromolar area

    4. C06.8 Malignant neoplasm of overlapping sites of other and unspecified parts of mouth

      1. C06.80 Malignant neoplasm of overlapping sites of unspecified parts of mouth

      2. C06.89 Malignant neoplasm of overlapping sites of other parts of mouth

        Inclusion term(s):

        • 'book leaf' neoplasm [ventral surface of tongue and floor of mouth]
    5. C06.9 Malignant neoplasm of mouth, unspecified

      Inclusion term(s):

      • Malignant neoplasm of minor salivary gland, unspecified site
      • Malignant neoplasm of oral cavity NOS
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.