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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