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. D43 Neoplasm of uncertain behavior of brain and central nervous system

    1. D43.0 Neoplasm of uncertain behavior of brain, supratentorial

      Inclusion term(s):

      • Neoplasm of uncertain behavior of cerebral ventricle
      • Neoplasm of uncertain behavior of cerebrum
      • Neoplasm of uncertain behavior of frontal lobe
      • Neoplasm of uncertain behavior of occipital lobe
      • Neoplasm of uncertain behavior of parietal lobe
      • Neoplasm of uncertain behavior of temporal lobe
    2. D43.1 Neoplasm of uncertain behavior of brain, infratentorial

      Inclusion term(s):

      • Neoplasm of uncertain behavior of brain stem
      • Neoplasm of uncertain behavior of cerebellum
      • Neoplasm of uncertain behavior of fourth ventricle
    3. D43.2 Neoplasm of uncertain behavior of brain, unspecified

    4. D43.3 Neoplasm of uncertain behavior of cranial nerves

    5. D43.4 Neoplasm of uncertain behavior of spinal cord

    6. D43.8 Neoplasm of uncertain behavior of other specified parts of central nervous system

    7. D43.9 Neoplasm of uncertain behavior of central nervous system, unspecified

      Inclusion term(s):

      • Neoplasm of uncertain behavior of nervous system (central) 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.