C56 — Malignant neoplasm of ovary
C56 is a non-billable header ICD-10-CM code for malignant neoplasm of ovary. It cannot be billed on its own: choose one of the more specific child codes below.
Use additional code
Add a secondary code to capture the detail described below.
- code to identify any functional activity
Other codes that can never be billed with C56
These codes carry an Excludes1 note pointing at C56. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C56 alone.
- C75Malignant neoplasm of other endocrine glands and related structures
Risk adjustment
C56 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
How C56 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to C56.
- Brenner›tumor›malignant
Code to one of these instead C56
4 child codes. Green means billable.
Questions about C56
- Is C56 a billable ICD-10-CM code?
- No. C56 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does C56 sit in the tabular list?
- Neoplasms (C00-D49), in the block Malignant neoplasms of female genital organs (C51-C58).