C56.9 – Malignant neoplasm of unspecified ovary
ICD-10-CM 2027 diagnosis code · Malignant neoplasms of female genital organs
ICD-10-CM code
C56.9
- Code
C56.9(claims format:C569)- Description
- Malignant neoplasm of unspecified ovary
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 2. Neoplasms (C00-D49)
- Block
- C51-C58 Malignant neoplasms of female genital organs
- Parent codes
- C56
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
C56 – Malignant neoplasm of ovary
Use additional code:
- code to identify any functional activity
Block C51-C58
Includes:
- malignant neoplasm of skin of female genital organs
Index terms for C56.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Cancer, ovarian
- Dysgerminoma, unspecified site, female
- Tumor, yolk sac, unspecified site, female
- Carcinoma, papillocystic, unspecified site
- Carcinoma, pseudomucinous, unspecified site
- Cystadenocarcinoma, serous, unspecified site
- Adenocarcinoma, duct, unspecified site, female
- Cystadenocarcinoma, mucinous, unspecified site
- Carcinoma, serous, papillary, unspecified site
- Carcinoma, papillary, serous, unspecified site
- Adenocarcinoma, papillocystic, unspecified site
- Cystadenocarcinoma, papillary, unspecified site
- Leydig cell, carcinoma, unspecified site, female
- Carcinoma, Leydig cell, unspecified site, female
- Adenocarcinoma, pseudomucinous, unspecified site
- Carcinoma, endometrioid, unspecified site, female
- Sertoli cell, carcinoma, unspecified site, female
- Carcinoma, Sertoli cell, unspecified site, female
- Androblastoma, malignant, unspecified site, female
- Adenocarcinoma, papillary, serous, unspecified site
- Adenocarcinoma, serous, papillary, unspecified site
- Cystadenocarcinoma, pseudomucinous, unspecified site
- Arrhenoblastoma, malignant, unspecified site, female
- Cystadenocarcinoma, papillary, serous, unspecified site
- Cystadenocarcinoma, serous, papillary, unspecified site
Related codes in C56
Frequently asked questions
What is ICD-10 code C56.9?
C56.9 is the ICD-10-CM code for malignant neoplasm of unspecified ovary, in the block C51-C58 (Malignant neoplasms of female genital organs).
Is C56.9 a billable code?
Yes. C56.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does C56.9 belong to?
It belongs to category C56 – Malignant neoplasm of ovary.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.