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. D48 Neoplasm of uncertain behavior of other and unspecified sites

    1. D48.0 Neoplasm of uncertain behavior of bone and articular cartilage

    2. D48.1 Neoplasm of uncertain behavior of connective and other soft tissue

      Inclusion term(s):

      • Neoplasm of uncertain behavior of connective tissue of ear
      • Neoplasm of uncertain behavior of connective tissue of eyelid
      • Stromal tumors of uncertain behavior of digestive system
    3. D48.2 Neoplasm of uncertain behavior of peripheral nerves and autonomic nervous system

    4. D48.3 Neoplasm of uncertain behavior of retroperitoneum

    5. D48.4 Neoplasm of uncertain behavior of peritoneum

    6. D48.5 Neoplasm of uncertain behavior of skin

      Inclusion term(s):

      • Neoplasm of uncertain behavior of anal margin
      • Neoplasm of uncertain behavior of anal skin
      • Neoplasm of uncertain behavior of perianal skin
      • Neoplasm of uncertain behavior of skin of breast
    7. D48.6 Neoplasm of uncertain behavior of breast

      Inclusion term(s):

      • Neoplasm of uncertain behavior of connective tissue of breast
      • Cystosarcoma phyllodes
      1. D48.60 Neoplasm of uncertain behavior of unspecified breast

      2. D48.61 Neoplasm of uncertain behavior of right breast

      3. D48.62 Neoplasm of uncertain behavior of left breast

    8. D48.7 Neoplasm of uncertain behavior of other specified sites

      Inclusion term(s):

      • Neoplasm of uncertain behavior of eye
      • Neoplasm of uncertain behavior of heart
      • Neoplasm of uncertain behavior of peripheral nerves of orbit
    9. D48.9 Neoplasm of uncertain behavior, 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.