2019 ICD-10-CM Diagnosis Code C56

Malignant neoplasm of ovary

    2016 2017 2018 2019 Non-Billable/Non-Specific Code
  • C56 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2019 edition of ICD-10-CM C56 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of C56 - other international versions of ICD-10 C56 may differ.
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Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • code to identify any functional activity
The following code(s) above C56 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to C56:
  • C00-D49
    2019 ICD-10-CM Range C00-D49

    Neoplasms

    Note
    • Functional activity
    • 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.
    • Morphology [Histology]
    • 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.
    • Primary malignant neoplasms overlapping site boundaries
    • 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.
    • Malignant neoplasm of ectopic tissue
    • 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).
    Neoplasms
  • C51-C58
    2019 ICD-10-CM Range C51-C58

    Malignant neoplasms of female genital organs

    Includes
    • malignant neoplasm of skin of female genital organs
    Malignant neoplasms of female genital organs
Clinical Information
  • A primary or metastatic malignant neoplasm involving the ovary. Most primary malignant ovarian neoplasms are either carcinomas (serous, mucinous, or endometrioid adenocarcinomas) or malignant germ cell tumors. Metastatic malignant neoplasms to the ovary include carcinomas, lymphomas, and melanomas.
  • A primary or metastatic malignant tumor involving the ovary. Most primary malignant ovarian neoplasms are either carcinomas (serous, mucinous, or endometrioid adenocarcinomas) or malignant germ cell tumors. Metastatic malignant neoplasms to the ovary include carcinomas, lymphomas, and melanomas.
  • Cancer that forms in tissues of the ovary (one of a pair of female reproductive glands in which the ova, or eggs, are formed). Most ovarian cancers are either ovarian epithelial carcinomas (cancer that begins in the cells on the surface of the ovary) or malignant germ cell tumors (cancer that begins in egg cells).
  • The ovaries are part of the female reproductive system. They produce a woman's eggs and female hormones. Each ovary is about the size and shape of an almond.cancer of the ovary is not common, but it causes more deaths than other female reproductive cancers. The sooner ovarian cancer is found and treated, the better your chance for recovery. But ovarian cancer is hard to detect early. Women with ovarian cancer may have no symptoms or just mild symptoms until the disease is in an advanced stage. Then it is hard to treat. Symptoms may include
    • a heavy feeling in the pelvis
    • pain in the lower abdomen
    • bleeding from the vagina
    • weight gain or loss
    • abnormal periods
    • unexplained back pain that gets worse
    • gas, nausea, vomiting, or loss of appetite
    to diagnose ovarian cancer, doctors do one or more tests. They include a physical exam, a pelvic exam, lab tests, ultrasound, or a biopsy. Treatment is usually surgery followed by chemotherapy. nih: national cancer institute
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
Code annotations containing back-references to C56:
  • Code First: R18.0
    ICD-10-CM Diagnosis Code R18.0

    Malignant ascites

      2016 2017 2018 2019 Billable/Specific Code
    Code First
    • malignancy, such as:
    • malignant neoplasm of ovary (C56.-)
    • secondary malignant neoplasm of retroperitoneum and peritoneum (C78.6)
  • Type 1 Excludes: C75
    ICD-10-CM Diagnosis Code C75

    Malignant neoplasm of other endocrine glands and related structures

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • malignant carcinoid tumors (C7A.0-)
    • malignant neoplasm of adrenal gland (C74.-)
    • malignant neoplasm of endocrine pancreas (C25.4)
    • malignant neoplasm of islets of Langerhans (C25.4)
    • malignant neoplasm of ovary (C56.-)
    • malignant neoplasm of testis (C62.-)
    • malignant neoplasm of thymus (C37)
    • malignant neoplasm of thyroid gland (C73)
    • malignant neuroendocrine tumors (C7A.-)

Diagnosis Index entries containing back-references to C56:
  • Adenofibroma
    • endometrioid D27.9
      ICD-10-CM Diagnosis Code D27.9

      Benign neoplasm of unspecified ovary

        2016 2017 2018 2019 Billable/Specific Code Female Dx
      • malignant C56-
  • Brenner
    • tumor (benign) D27.9
      ICD-10-CM Diagnosis Code D27.9

      Benign neoplasm of unspecified ovary

        2016 2017 2018 2019 Billable/Specific Code Female Dx
      • malignant C56
  • Carcinoma (malignant) - see also Neoplasm, by site, malignant
    • granulosa cell C56-
  • Dermoid (cyst) - see also Neoplasm, benign, by site
    • with malignant transformation C56-
  • Teratoma (solid) - see also Neoplasm, uncertain behavior, by site
    • ovary
      • embryonal, immature or malignant C56-
  • Thecoma D27-
    ICD-10-CM Diagnosis Code D27-
    • D27 Benign neoplasm of ovary
      • D27.0 Benign neoplasm of right ovary
      • D27.1 Benign neoplasm of left ovary
      • D27.9 Benign neoplasm of unspecified ovary
    • malignant C56-
  • Tumor - see also Neoplasm, unspecified behavior, by site
    • Brenner D27.9
      ICD-10-CM Diagnosis Code D27.9

      Benign neoplasm of unspecified ovary

        2016 2017 2018 2019 Billable/Specific Code Female Dx
      • malignant C56-
    • dermoid - see Neoplasm, benign, by site
      • with malignant transformation C56-
    • granulosa cell D39.1-
      ICD-10-CM Diagnosis Code D39.1-

      Neoplasm of uncertain behavior of ovary

        2016 2017 2018 2019 Non-Billable/Non-Specific Code
      Use Additional
      • code to identify any functional activity.
      • malignant C56-
    • granulosa cell-theca cell D39.1-
      ICD-10-CM Diagnosis Code D39.1-

      Neoplasm of uncertain behavior of ovary

        2016 2017 2018 2019 Non-Billable/Non-Specific Code
      Use Additional
      • code to identify any functional activity.
      • malignant C56-
    • papillary - see also Papilloma

ICD-10-CM Codes Adjacent To C56
C53.8 Malignant neoplasm of overlapping sites of cervix uteri
C53.9 Malignant neoplasm of cervix uteri, unspecified
C54 Malignant neoplasm of corpus uteri
C54.0 Malignant neoplasm of isthmus uteri
C54.1 Malignant neoplasm of endometrium
C54.2 Malignant neoplasm of myometrium
C54.3 Malignant neoplasm of fundus uteri
C54.8 Malignant neoplasm of overlapping sites of corpus uteri
C54.9 Malignant neoplasm of corpus uteri, unspecified
C55 Malignant neoplasm of uterus, part unspecified
C56 Malignant neoplasm of ovary
C56.1 Malignant neoplasm of right ovary
C56.2 Malignant neoplasm of left ovary
C56.9 Malignant neoplasm of unspecified ovary
C57 Malignant neoplasm of other and unspecified female genital organs
C57.0 Malignant neoplasm of fallopian tube
C57.00 Malignant neoplasm of unspecified fallopian tube
C57.01 Malignant neoplasm of right fallopian tube
C57.02 Malignant neoplasm of left fallopian tube
C57.1 Malignant neoplasm of broad ligament
C57.10 Malignant neoplasm of unspecified broad ligament

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.