C56.9 Malignant neoplasm of unspecified ovary
Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.
Applies from C56 Malignant neoplasm of ovary
Use additional code
- code to identify any functional activity
Risk adjustment (HCC)
- CMS-HCC V28: HCC 22 — Bladder, Colorectal, and Other Cancers
- CMS-HCC V22: HCC 10 — Lymphoma and Other Cancers
- RxHCC V08: HCC 22 — Prostate, Breast, Bladder, and Other Cancers and Tumors
- ESRD V24: HCC 10
MS-DRG index
Defines the logic of DRG(s) 736-741 in MDC 13.
Approximate ICD-9-CM (GEMs)
183.0 Malignant neoplasm of ovary (approximate)
Code annotations containing back-references to C56.9
Back-references to C56
- Type 1 Excludes:
C75 Malignant neoplasm of other endocrine glands and related structures ("malignant neoplasm of ovary (C56.-)") - Code First:
R18.0 Malignant ascites ("malignant neoplasm of ovary (C56.-)") - Code First:
Z17 Estrogen, and other hormones and factors receptor status ("malignant neoplasm of ovary (C56.-)")
Diagnosis Index entries for C56.9
- Adenocarcinoma › duct › unspecified site › female
- Adenocarcinoma › papillary › serous › unspecified site
- Adenocarcinoma › papillocystic › unspecified site
- Adenocarcinoma › pseudomucinous › unspecified site
- Adenocarcinoma › serous › papillary › unspecified site
- Androblastoma › malignant › unspecified site › female
- Arrhenoblastoma › malignant › unspecified site › female
- Cancer › ovarian
- Carcinoma (malignant) › endometrioid › unspecified site › female
- Carcinoma (malignant) › Leydig cell (testis) › unspecified site › female
- Carcinoma (malignant) › papillary › serous › surface › unspecified site
- Carcinoma (malignant) › papillary › serous › unspecified site
- Carcinoma (malignant) › papillocystic › unspecified site
- Carcinoma (malignant) › pseudomucinous › unspecified site
- Carcinoma (malignant) › serous › papillary › unspecified site
- Carcinoma (malignant) › serous › surface, papillary › unspecified site
- Carcinoma (malignant) › Sertoli cell › unspecified site › female
- Cystadenocarcinoma › endometrioid › unspecified site › female
- Cystadenocarcinoma › mucinous › papillary › unspecified site
- Cystadenocarcinoma › mucinous › unspecified site
- Cystadenocarcinoma › papillary › mucinous › unspecified site
- Cystadenocarcinoma › papillary › pseudomucinous › unspecified site
- Cystadenocarcinoma › papillary › serous › unspecified site
- Cystadenocarcinoma › papillary › unspecified site
- Cystadenocarcinoma › pseudomucinous › papillary › unspecified site
- Cystadenocarcinoma › pseudomucinous › unspecified site
- Cystadenocarcinoma › serous › papillary › unspecified site
- Cystadenocarcinoma › serous › unspecified site
- Cystadenoma › mucinous › borderline malignancy › unspecified site
- Cystadenoma › mucinous › papillary › borderline malignancy › unspecified site
- Cystadenoma › papillary › borderline malignancy › unspecified site
- Cystadenoma › papillary › mucinous › borderline malignancy › unspecified site
- Cystadenoma › papillary › pseudomucinous › borderline malignancy › unspecified site
- Cystadenoma › papillary › serous › borderline malignancy › unspecified site
- Cystadenoma › pseudomucinous › borderline malignancy › unspecified site
- Cystadenoma › pseudomucinous › papillary › borderline malignancy › unspecified site
- Cystadenoma › serous › borderline malignancy › unspecified site
- Cystadenoma › serous › papillary › borderline malignancy › unspecified site
- Dysgerminoma › unspecified site › female
- Leydig cell › carcinoma › unspecified site › female
- Sertoli cell › carcinoma › unspecified site (male) › female
- Tumor › Leydig cell › malignant › unspecified site › female
- Tumor › mucinous of low malignant potential › unspecified site
- Tumor › papillary › mucinous of low malignant potential › unspecified site
- Tumor › papillary › serous of low malignant potential › unspecified site
- Tumor › polyvesicular vitelline › unspecified site › female
- Tumor › serous of low malignant potential › unspecified site
- Tumor › yolk sac › unspecified site › female
Nearby codes
C56 Malignant neoplasm of ovaryC56.1 Malignant neoplasm of right ovaryC56.2 Malignant neoplasm of left ovaryC56.3 Malignant neoplasm of bilateral ovariesC56.9 Malignant neoplasm of unspecified ovary (this code)