C56.9 is the authoritative medical code for Malignant neoplasm of unspecified ovary. This classification is used in medical billing and clinical recording to specify the clinical criteria for malignant neoplasm of unspecified ovary (ICD-10-CM C56.9), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Malignant neoplasm of unspecified ovary is a billable ICD-10-CM diagnosis code C56.9. Includes: malignant neoplasm of skin of female genital organs. Use additional code: code to identify any functional activity.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for C56.9 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- malignant neoplasm of skin of female genital organs
Use Additional Code
Supplementary codes the tabular list directs you to add.
- code to identify any functional activity
Frequently Asked Questions (FAQ) & Clinical Guidance
Is an additional code needed with C56.9?
Use additional code(s) to specify: code to identify any functional activity.
Codes in This Family (4)
Official ICD-10-CM classifications in the same code family as C56.9, with their registry titles.
- C56 — Malignant neoplasm of ovary
- C56.1 — Malignant neoplasm of right ovary
- C56.2 — Malignant neoplasm of left ovary
- C56.3 — Malignant neoplasm of bilateral ovaries
Indexed Clinical Terms (47)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- 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
- 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
Neoplasm Table Sites (2)
Anatomical sites from the official ICD-10-CM Table of Neoplasms that map to this code, with the matching behavior column.
- Neoplasm, neoplastic, corpus, albicans — Malignant, Primary
- Neoplasm, neoplastic, ovary — Malignant, Primary
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code C57.9
Malignant neoplasm of female genital organ, unspecified