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. D42 Neoplasm of uncertain behavior of meninges

    1. D42.0 Neoplasm of uncertain behavior of cerebral meninges

    2. D42.1 Neoplasm of uncertain behavior of spinal meninges

    3. D42.9 Neoplasm of uncertain behavior of meninges, 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.