Chapter 2

C00–D49: Neoplasms

Neoplasms diagnostic classification updated for 2026.

Internal Codes
  • C50.422

    Malignant neoplasm of upper-outer quadrant of left male breast

  • C50.429

    Malignant neoplasm of upper-outer quadrant of unspecified male breast

  • C50.5

    Malignant neoplasm of lower-outer quadrant of breast

  • C50.51

    Malignant neoplasm of lower-outer quadrant of breast, female

  • C50.511

    Malignant neoplasm of lower-outer quadrant of right female breast

  • C50.512

    Malignant neoplasm of lower-outer quadrant of left female breast

  • C50.519

    Malignant neoplasm of lower-outer quadrant of unspecified female breast

  • C50.52

    Malignant neoplasm of lower-outer quadrant of breast, male

  • C50.521

    Malignant neoplasm of lower-outer quadrant of right male breast

  • C50.522

    Malignant neoplasm of lower-outer quadrant of left male breast

  • C50.529

    Malignant neoplasm of lower-outer quadrant of unspecified male breast

  • C50.6

    Malignant neoplasm of axillary tail of breast

  • C50.61

    Malignant neoplasm of axillary tail of breast, female

  • C50.611

    Malignant neoplasm of axillary tail of right female breast

  • C50.612

    Malignant neoplasm of axillary tail of left female breast

  • C50.619

    Malignant neoplasm of axillary tail of unspecified female breast

  • C50.62

    Malignant neoplasm of axillary tail of breast, male

  • C50.621

    Malignant neoplasm of axillary tail of right male breast

  • C50.622

    Malignant neoplasm of axillary tail of left male breast

  • C50.629

    Malignant neoplasm of axillary tail of unspecified male breast

  • C50.8

    Malignant neoplasm of overlapping sites of breast

  • C50.81

    Malignant neoplasm of overlapping sites of breast, female

  • C50.811

    Malignant neoplasm of overlapping sites of right female breast

  • C50.812

    Malignant neoplasm of overlapping sites of left female breast

  • C50.819

    Malignant neoplasm of overlapping sites of unspecified female breast

  • C50.82

    Malignant neoplasm of overlapping sites of breast, male

  • C50.821

    Malignant neoplasm of overlapping sites of right male breast

  • C50.822

    Malignant neoplasm of overlapping sites of left male breast

  • C50.829

    Malignant neoplasm of overlapping sites of unspecified male breast

  • C50.9

    Malignant neoplasm of breast of unspecified site

  • C50.91

    Malignant neoplasm of breast of unspecified site, female

  • C50.911

    Malignant neoplasm of unspecified site of right female breast

  • C50.912

    Malignant neoplasm of unspecified site of left female breast

  • C50.919

    Malignant neoplasm of unspecified site of unspecified female breast

  • C50.92

    Malignant neoplasm of breast of unspecified site, male

  • C50.921

    Malignant neoplasm of unspecified site of right male breast

  • C50.922

    Malignant neoplasm of unspecified site of left male breast

  • C50.929

    Malignant neoplasm of unspecified site of unspecified male breast

  • C50.A

    Malignant inflammatory neoplasm of breast

  • C50.A0

    Malignant inflammatory neoplasm of unspecified breast

  • C50.A1

    Malignant inflammatory neoplasm of right breast

  • C50.A2

    Malignant inflammatory neoplasm of left breast

  • C51

    Malignant neoplasm of vulva

  • C51.0

    Malignant neoplasm of labium majus

  • C51.1

    Malignant neoplasm of labium minus

  • C51.2

    Malignant neoplasm of clitoris

  • C51.8

    Malignant neoplasm of overlapping sites of vulva

  • C51.9

    Malignant neoplasm of vulva, unspecified

  • C52

    Malignant neoplasm of vagina

  • C53

    Malignant neoplasm of cervix uteri

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