C56Header code — not billable

Malignant neoplasm of ovary

Chapter
2. Neoplasms
Category
C56
Effective date
October 1, 2026

Related codes in category C56

C56.1Malignant neoplasm of right ovaryYesC56.2Malignant neoplasm of left ovaryYesC56.3Malignant neoplasm of bilateral ovariesYesC56.9Malignant neoplasm of unspecified ovaryYes

Frequently asked questions

What is ICD-10 code C56?

C56 is an ICD-10-CM diagnosis code for Malignant neoplasm of ovary.

Is C56 a billable code?

No. C56 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is C56 in?

C56 falls under Chapter 2: Neoplasms.

When did C56 become effective?

C56 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to C56?

C56 belongs to category C56, which includes 4 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.