1. C13 Malignant neoplasm of hypopharynx

    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 dependence (Z87.891)
    occupational exposure to environmental tobacco smoke (Z57.31)
    tobacco dependence (F17.-)
    tobacco use (Z72.0)

    Excludes2

    • malignant neoplasm of pyriform sinus (C12)
    1. C13.0 Malignant neoplasm of postcricoid region

    2. C13.1 Malignant neoplasm of aryepiglottic fold, hypopharyngeal aspect

      Inclusion term(s):

      • Malignant neoplasm of aryepiglottic fold, marginal zone
      • Malignant neoplasm of aryepiglottic fold NOS
      • Malignant neoplasm of interarytenoid fold, marginal zone
      • Malignant neoplasm of interarytenoid fold NOS
    3. C13.2 Malignant neoplasm of posterior wall of hypopharynx

    4. C13.8 Malignant neoplasm of overlapping sites of hypopharynx

    5. C13.9 Malignant neoplasm of hypopharynx, unspecified

      Inclusion term(s):

      • Malignant neoplasm of hypopharyngeal wall 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.