What is the correct code or codes for a patient WHO is admitted for chemotherapy to treat ovarian cancer?

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Billable/Specific Code

C56.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2022 edition of ICD-10-CM C56.9 became effective on October 1, 2021.
This is the American ICD-10-CM version of C56.9 - other international versions of ICD-10 C56.9 may differ.

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

Annotation Back-References

Índice Show

NeoplasmsNoteFunctional activityAll 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 boundariesA 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 tissueMalignant 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).
Malignant neoplasms of female genital organsIncludesmalignant neoplasm of skin of female genital organs
Malignant neoplasm of testis, unspecified whether descended or undescended

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 C56.9:

C00-D49
2022 ICD-10-CM Range C00-D49
NeoplasmsNoteFunctional activityAll 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 boundariesA 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 tissueMalignant 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
2022 ICD-10-CM Range C51-C58
Malignant neoplasms of female genital organsIncludesmalignant neoplasm of skin of female genital organs
Malignant neoplasms of female genital organs
C56
ICD-10-CM Diagnosis Code C56
Use Additional
- code to identify any functional activity
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 v39.0):

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-CM

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
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change
2022 (effective 10/1/2021): No change

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

Adenocarcinoma - see also Neoplasm, malignant, by site
Androblastoma
- malignant
  - unspecified site
Arrhenoblastoma
- malignant
  - unspecified site
Cancer - see also Neoplasm, by site, malignant
- ovarian C56.9- - see also Neoplasm ovary, malignant
Carcinoma (malignant) - see also Neoplasm, by site, malignant
Cystadenocarcinoma - see Neoplasm, malignant, by site
Cystadenoma - see also Neoplasm, benign, by site
Dysgerminoma
- unspecified site
Leydig cell
- carcinoma
  - unspecified site
Sertoli cell
- carcinoma
  - unspecified site (male) C62.9-
    ICD-10-CM Diagnosis Code C62.9-
    Malignant neoplasm of testis, unspecified whether descended or undescended
Tumor - see also Neoplasm, unspecified behavior, by site