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 neoplasm of pharyngeal tonsil (C11.1)
 * 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 use (Z87.891)
 * occupational exposure to environmental tobacco smoke (Z57.31)
 * tobacco dependence (F17.-)
 * tobacco use (Z72.0)
 * C09.0 Malignant neoplasm of tonsillar fossa
 * C09.1 Malignant neoplasm of tonsillar pillar (anterior) (posterior)
 * C09.8 Malignant neoplasm of overlapping sites of tonsil
 * C09.9 Malignant neoplasm of tonsil, unspecified
 * Malignant neoplasm of tonsil NOS
 * Malignant neoplasm of faucial tonsils
 * Malignant neoplasm of palatine tonsils

C10 Malignant neoplasm of oropharynx

 * Excludes2: malignant neoplasm of tonsil (C09.-)
 * 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 use (Z87.891)
 * occupational exposure to environmental tobacco smoke (Z57.31)
 * tobacco dependence (F17.-)
 * tobacco use (Z72.0)
 * C10.0 Malignant neoplasm of vallecula
 * C10.1 Malignant neoplasm of anterior surface of epiglottis
 * Malignant neoplasm of epiglottis, free border [margin]
 * Malignant neoplasm of glossoepiglottic fold(s)
 * Excludes2: malignant neoplasm of epiglottis (suprahyoid portion) NOS (C32.1)
 * C10.2 Malignant neoplasm of lateral wall of oropharynx
 * C10.3 Malignant neoplasm of posterior wall of oropharynx
 * C10.4 Malignant neoplasm of branchial cleft
 * Malignant neoplasm of branchial cyst [site of neoplasm]
 * C10.8 Malignant neoplasm of overlapping sites of oropharynx
 * Malignant neoplasm of junctional region of oropharynx
 * C10.9 Malignant neoplasm of oropharynx, unspecified

C11 Malignant neoplasm of nasopharynx

 * Use additional code to identify:
 * exposure to environmental tobacco smoke (Z77.22)
 * exposure to tobacco smoke in the perinatal period (P96.81)
 * history of tobacco use (Z87.891)
 * occupational exposure to environmental tobacco smoke (Z57.31)
 * tobacco