2024 ICD-10-CM Diagnosis Code C56.9

by

Malignant neoplasm of unspecified ovary

  • C56.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2024 edition of ICD-10-CM C56.9 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of C56.9 – other international versions of ICD-10 C56.9 may differ.

ICD-10-CM Coding Rules

  • C56.9 is applicable to female patients.

The following code(s) above C56.9 contain annotation back-references

 that may be applicable to C56.9:

  • C00-D49  Neoplasms
  • C51-C58  Malignant neoplasms of female genital organs
  • C56  Malignant neoplasm of ovary

Approximate Synonyms

  • Cancer of the ovary
  • Cancer of the ovary with peritoneal metastases
  • Cancer of the ovary, disseminated
  • Cancer of the ovary, endometrioid
  • Cancer of the ovary, germ cell tumor
  • Cancer of the ovary, mixed mullerian
  • Cancer of the ovary, mucinous cystadenoca
  • Cancer of the ovary, mucinous cystadenocarcinoma
  • Cancer of the ovary, papillary serous cystadenoca
  • Cancer of the ovary, papillary serous cystadenocarcinoma
  • Cancer of the ovary, primary
  • Cancer of the ovary, sarcoma
  • Cancer of the ovary, sex chord tumor
  • Cancer of the ovary, stage 1
  • Cancer of the ovary, stage 2
  • Cancer of the ovary, stage 3
  • Cancer of the ovary, stage 4
  • Cancer of the ovary, undifferentiated
  • Carcinoma of ovary, stage 1
  • Carcinoma of ovary, stage 2
  • Carcinoma of ovary, stage 3
  • Carcinoma of ovary, stage 4
  • Endometrioid carcinoma ovary
  • Germ cell tumor of ovary
  • Malignant germ cell tumor of ovary
  • Mucinous cystadenocarcinoma of ovary
  • Ovarian cancer
  • Ovarian cancer metastatic to peritoneum
  • Ovarian cancer, disseminated
  • Primary malignant neoplasm of ovary
  • Primary malignant tumor of ovary of mixed mullerian type
  • Sarcoma of ovary
  • Sarcoma, ovary
  • Serous papillary cystadenocarcinoma ovary
  • Sex cord tumor of ovary
  • Undifferentiated carcinoma of ovary

ICD-10-CM C56.9 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 736 Uterine and adnexa procedures for ovarian or adnexal malignancy with mcc
  • 737 Uterine and adnexa procedures for ovarian or adnexal malignancy with cc
  • 738 Uterine and adnexa procedures for ovarian or adnexal malignancy without cc/mcc
  • 739 Uterine and adnexa procedures for non-ovarian and non-adnexal malignancy with mcc
  • 740 Uterine and adnexa procedures for non-ovarian and non-adnexal malignancy with cc
  • 741 Uterine and adnexa procedures for non-ovarian and non-adnexal malignancy without cc/mcc
  • 754 Malignancy, female reproductive system with mcc
  • 755 Malignancy, female reproductive system with cc
  • 756 Malignancy, female reproductive system without cc/mcc

Convert C56.9 to ICD-9-CMCode 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
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change

Diagnosis Index entries containing back-references to C56.9: