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 neoplasm of mucosa of lip, unspecified
 * Malignant neoplasm of oral aspect of lip, unspecified
 * C00.6 Malignant neoplasm of commissure of lip, unspecified
 * C00.8 Malignant neoplasm of overlapping sites of lip
 * C00.9 Malignant neoplasm of lip, unspecified

C01 Malignant neoplasm of base of tongue

 * Includes: malignant neoplasm of dorsal surface of base of tongue
 * malignant neoplasm of fixed part of tongue NOS
 * malignant neoplasm of posterior third of tongue
 * Use additional code to identify:
 * alcohol abuse and dependence (F10.-)
 * history of tobacco use (Z87.891)
 * tobacco dependence (F17.-)
 * tobacco use (Z72.0)

C02 Malignant neoplasm of other and unspecified parts of tongue

 * Use additional code to identify:
 * alcohol abuse and dependence (F10.-)
 * history of tobacco use (Z87.891)
 * tobacco dependence (F17.-)
 * tobacco use (Z72.0)
 * C02.0 Malignant neoplasm of dorsal surface of tongue
 * Malignant neoplasm of anterior two-thirds of tongue, dorsal surface
 * Excludes2: malignant neoplasm of dorsal surface of base of tongue (C01)
 * C02.1 Malignant neoplasm of border of tongue
 * Malignant neoplasm of tip of tongue
 * C02.2 Malignant neoplasm of ventral surface of tongue
 * Malignant neoplasm of anterior two-thirds of tongue, ventral surface
 * Malignant neoplasm of frenulum linguae
 * C02.3 Malignant neoplasm of anterior two-thirds of tongue, part unspecified
 * Malignant neoplasm of middle third of tongue NOS
 * Malignant neoplasm of mobile part of tongue NOS
 * C02.4 Malignant neoplasm of lingual tonsil
 * Excludes2: malignant neoplasm of tonsil NOS (C09.9)
 * C02.8 Malignant neoplasm of overlapping sites of tongue
 * Malignant neoplasm of two or more contiguous sites of tongue
 * C02.9 Malignant neoplasm of tongue, unspecified

C03 Malignant neoplasm of gum

 * Includes: malignant neoplasm of alveolar (ridge) mucosa
 * malignant neoplasm of gingiva
 * Excludes2: malignant odontogenic neoplasms (C41.0-C41.1)
 * Use additional code to identify:
 * alcohol abuse and dependence (F10.-)
 * history