C56

Malignant neoplasm of ovary

Non-billable header

C56 is a non-billable header code. Use one of the more specific codes below.

Inclusion terms

Includes

  • malignant neoplasm of skin of female genital organs
  • Note: Functional activity
  • Note: All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
  • Note: Morphology [Histology]
  • Note: Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
  • Note: Primary malignant neoplasms overlapping site boundaries
  • Note: A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
  • Note: Malignant neoplasm of ectopic tissue
  • Note: Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

Use additional code

Add a code to identify the following, if applicable.

  • code to identify any functional activity

Also known as

  • Adenofibroma, endometrioid, malignant
  • Brenner, tumor, malignant
  • Carcinoma, granulosa cell
  • Carcinoma, theca cell
  • Cyst, dermoid, with malignant transformation
  • Cystadenofibroma, endometrioid, malignant
  • Cystadenoma, mucinous, borderline malignancy, ovary
  • Cystadenoma, papillary, borderline malignancy, ovary
  • Cystadenoma, pseudomucinous, borderline malignancy, ovary
  • Cystadenoma, serous, borderline malignancy, ovary
  • Dermoid, with malignant transformation
  • Teratoma, ovary, embryonal, immature or malignant
  • Thecoma, malignant
  • Tumor, Brenner, malignant
  • Tumor, dermoid, with malignant transformation

More specific codes C56

  • C56.1Malignant neoplasm of right ovaryBillable
  • C56.2Malignant neoplasm of left ovaryBillable
  • C56.3Malignant neoplasm of bilateral ovariesBillable
  • C56.9Malignant neoplasm of unspecified ovaryBillable

Related codes

  • C51Malignant neoplasm of vulvaHeader
  • C52Malignant neoplasm of vaginaBillable
  • C53Malignant neoplasm of cervix uteriHeader
  • C54Malignant neoplasm of corpus uteriHeader
  • C55Malignant neoplasm of uterus, part unspecifiedBillable
  • C57Malignant neoplasm of other and unspecified female genital organsHeader
  • C58Malignant neoplasm of placentaBillable

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