C57.9
BillableMalignant neoplasm of female genital organ, unspecified
HCC Category Mapping
V28HCC 22 — Colorectal, Bladder, and Other Cancers
0.000V24HCC 11 — Colorectal, Bladder, and Other Cancers
0.306ESRDHCC 11 — Colorectal, Bladder, and Other Cancers
0.000What This Code Means
Cancer of a female genital organ when the specific organ or structure involved cannot be determined or identified.
Coding Tips
- •This is the least specific code in the C57 category; attempt to obtain more specific site information
- •Request clarification from the provider if the cancer location is not documented
Clinical Significance
This is the least specific code for female genital organ malignancy, used only when the provider documents cancer of a female genital organ but does not specify which organ is affected. In risk adjustment, this code raises red flags for insufficient documentation and is a prime target for coding audits. Provider queries should always be pursued before defaulting to this code.
Documentation Requirements
- ✓Documentation of a confirmed malignancy of a female genital organ
- ✓Evidence that provider query was attempted to identify the specific organ
- ✓Explanation of why the specific organ cannot be determined
- ✓Current treatment status and plan
Commonly Confused Codes
C56.1/C56.2/C56.9 — Ovarian cancer; query provider if ovary might be the siteC55 — Uterine cancer unspecified; if uterus is mentioned, use C55 rather than C57.9C57.4 — Uterine adnexa unspecified; more specific than C57.9 if adnexa is mentionedC57.7 — Other specified female genital organs; use when a specific organ is named
Code Hierarchy
└C57Malignant neoplasm of other and unspecified female genital organs└C57.9Malignant neoplasm of female genital organ, unspecified
└C57.9Malignant neoplasm of female genital organ, unspecified