Categories D37-D44, and D48 classify by site neoplasms of uncertain behavior, i.e., histologic confirmation whether the neoplasm is malignant or benign cannot be made.

Excludes1

  • neoplasms of unspecified behavior (D49.-)
  1. D38 Neoplasm of uncertain behavior of middle ear and respiratory and intrathoracic organs

    Excludes1

    • neoplasm of uncertain behavior of heart (D48.7)
    1. D38.0 Neoplasm of uncertain behavior of larynx

      Inclusion term(s):

      • Neoplasm of uncertain behavior of aryepiglottic fold or interarytenoid fold, laryngeal aspect
      • Neoplasm of uncertain behavior of epiglottis (suprahyoid portion)
    2. D38.1 Neoplasm of uncertain behavior of trachea, bronchus and lung

    3. D38.2 Neoplasm of uncertain behavior of pleura

    4. D38.3 Neoplasm of uncertain behavior of mediastinum

    5. D38.4 Neoplasm of uncertain behavior of thymus

    6. D38.5 Neoplasm of uncertain behavior of other respiratory organs

      Inclusion term(s):

      • Neoplasm of uncertain behavior of accessory sinuses
      • Neoplasm of uncertain behavior of cartilage of nose
      • Neoplasm of uncertain behavior of middle ear
      • Neoplasm of uncertain behavior of nasal cavities
    7. D38.6 Neoplasm of uncertain behavior of respiratory organ, unspecified

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.