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. D44 Neoplasm of uncertain behavior of endocrine glands

    Excludes1

    • multiple endocrine adenomatosis (E31.2-)
    • multiple endocrine neoplasia (E31.2-)
    • neoplasm of uncertain behavior of endocrine pancreas (D37.8)
    • neoplasm of uncertain behavior of ovary (D39.1-)
    • neoplasm of uncertain behavior of testis (D40.1-)
    • neoplasm of uncertain behavior of thymus (D38.4)
    1. D44.0 Neoplasm of uncertain behavior of thyroid gland

    2. D44.1 Neoplasm of uncertain behavior of adrenal gland

      1. D44.10 Neoplasm of uncertain behavior of unspecified adrenal gland

      2. D44.11 Neoplasm of uncertain behavior of right adrenal gland

      3. D44.12 Neoplasm of uncertain behavior of left adrenal gland

    3. D44.2 Neoplasm of uncertain behavior of parathyroid gland

    4. D44.3 Neoplasm of uncertain behavior of pituitary gland

    5. D44.4 Neoplasm of uncertain behavior of craniopharyngeal duct

    6. D44.5 Neoplasm of uncertain behavior of pineal gland

    7. D44.6 Neoplasm of uncertain behavior of carotid body

    8. D44.7 Neoplasm of uncertain behavior of aortic body and other paraganglia

    9. D44.9 Neoplasm of uncertain behavior of unspecified endocrine gland

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.